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REPORTS AND SCIENTIFIC PUBLICATIONS

Comparison of blood biochemical parameters of four species of vultures.
Petrov R, Yarkov D, Chaprazov T, Andonova Y, Dimitrova S, Lazarova I (2023).Biodiversity Data Journal 11: e97164. https://doi.org/10.3897/BDJ.11.e97164

Basic blood biochemical parameters of wild common ravens (Corvus corax). Chaprazov T, Petrov R, Yarkov D, Andonova Y, Lazarova I (2023).Biodiversity Data Journal 11: e103271. https://doi.org/10.3897/BDJ.11.e103271


Assessing genetic diversity patterns at neutral and adaptive loci to inform population reinforcement of an endangered migratory vulture.
Bounas, A., Saravia-Mullin, V., Méndez, M., Arkumarev, V., Aghajanyan, L., Ararat, K., Buechley, E, Dobrev, V., Dobrev, D., Efrat, R., Klisurov, I., Kret, K., Skartsi, T., Oppel, S., Petrov, R., Şekercioğlu, C., Donázar, J.A., Nikolov, S.C., Sotiropoulos, K. (2023).Journal of Ornithology 164, 677–688


First Biochemical Comparison Between Saker Falcon Subspecies Falco cherrug cherrug and Falco cherrug milvipes.
Petrov R, Lazarova I, Yarkov D, Andonova Y, Dimitrova S. (2023). Journal of Raptor Research; doi: https://doi.org/10.3356/JRR-22-28

  
Main cause for admittance of White Storks in Wildlife Rehabilitation and Breeding Centre in Bulgaria.
Petrov R, Lazarova I, Beleva G, Gradev G. (2023).Scientific Papers. Series D. Animal Science Vol. LXVI, No. 1


First record of the northern bald ibis Geronticus eremita (Linnaeus, 1758) in Bulgaria.
Boev, Z., Gradev, G., Klisurova, H., Klisurov, I., Petrov, R.Historia naturalis bulgarica 41: 23–26.    DOI: 10.48027/hnb.41.03001 

High voltage pylons as roost sites of Lesser Kestrel (Falco naumani) during the pre-migratory period in Southeastern Balkans.
Gradev G., I. Klisurov, S. Marin, S. Yaneva, G. Stoyanov, H. Peshev, P. Stankov, R. Petrov, T. Ryslavy. 2023.  Agricultural University – Plovdiv, Agricultural Sciences, Volume 15, Issue 38, 33 – 39. DOI: 10.22620/agrisci.2023.38.003. 


Overview of ecosystem services provided by Lesser Kestrel in its main-breeding habitat in Bulgaria.
Gradev, G., S. Yaneva, T. Bileva, M. Makri, K. Vlachopoulos. 2023. Scientific Papers. Series D. Animal Science. Vol. LXVI, No. 2, 2023, 605-611. ISSN 2285-5750; ISSN CD-ROM 2285-5769; ISSN Online 2393-2260; ISSN-L 2285-5750. 


Main cause for admittance of white storks in wildlife rehabilitation and breeding centre in Bulgaria.
Petrov R., I. Lazarova, G. Beleva, G. Gradev. 2023. Scientific Papers. Series D. Animal Science. Vol. LXVI, No. 1, 2023, 370 - 376. ISSN 2285-5750; ISSN CD-ROM 2285-5769; ISSN Online 2393-2260; ISSN-L 2285-5750. 


Analysis of some behavioral reactions of Karakachan horses.
Popova M., G. Gradev. 2023. Scientific Papers. Series D. Animal Science. Vol. LXVI, No. 1, 2023, 333 - 339. ISSN 2285-5750; ISSN CD-ROM 2285-5769; ISSN Online 2393-2260; ISSN-L 2285-5750.


Potentialities for using certain modern technologies for the tracking and monitoring of free-roaming horses.
Popova M., P. Zhelev, G. Gradev. 2023. Series D. Animal Science. Vol. LXVI, No. 2, 2023, 605 - 611. ISSN 2285-5750; ISSN CD-ROM 2285-5769; ISSN Online 2393-2260; ISSN-L 2285-5750.


Occupation rates of artificial nest boxes by Lesser Kestrel in SPA “Sakar” (BG0002021), Bulgaria.
Yaneva S., G. Gradev, T. Bileva. 2023. Series D. Animal Science. Vol. LXVI, No. 2, 2023, 680 - 685. ISSN 2285-5750; ISSN CD-ROM 2285-5769; ISSN Online 2393-2260; ISSN-L 2285-5750. 


Good examples of electrical network security for Lesser Kestrel (Falco naumanni) in SPA Sakar (BG002021).
Yaneva, S., Gradev, G., Marin, S. 2023. Agricultural University – Plovdiv, Agricultural Sciences, Volume 15, Issue 39, 79 - 82. DOI: 10.22620/agrisci.2023.39.009  


Different Types of Nest Boxes Used by Lesser Kestrel (Falco naumanni) after Being Recovered as a Breeder in Bulgaria.
Yaneva S., G. Gradev, T. Bileva. 2022. Scientific Papers. Series D. Animal Science. Vol. LXV, No. 1, 664 – 669. ISSN 2285-5750; ISSN CD-ROM 2285-5769; ISSN Online 2393-2260; ISSN-L 2285-5750. 


“Birds of Pomorie Lake – report after completion of restoration”, LIFE19 NAT/BG/000804 Technical report. 2023.

THE BIRDS OF POMORIE LAKE. Status and Checklist. Revised and updated second edition.
 Book. 2023. 

NUMBERS AND POPULATION DYNAMICS OF THE WHITE STORK (Ciconia ciconia) COLONY IN BELOZEM -THE EUROPEAN WHITE STORK VILLAGE IN BULGARIA -IN 2020-2022. Article. 2023.

Estimated mortality of the highly pathogenic avian influenza pandemic on northern gannets (Morus bassanus) in southwest Ireland. Article. 2023.

Assessment of the bycatch level for the Black Sea harbour porpoise in the light of new data on population abundance. Article. 2023.

Plastic Ingestion by Phocoena Phocoena and Tursiops Truncatus from the Black Sea. Chapter. 2023.

Seasonal Abundance, Density and Distribution of Cetaceans in the Bulgarian Black Sea Shelf in 2017. Article. 2023.

Genetic diversity and relatedness amongst captive saker falcons (Falco cherrug) in the Green Balkans’ Wildlife Rehabilitation and Breeding Centre in Bulgaria.
Petrov R, Hoareau T, Lesobre L, Andonova Y, Yarkov D, Chakarov N. (2023). Biodiversity Data Journal 11: e105863. https://doi.org/10.3897/BDJ.11.e105863

Diets for captive breeding and hacking of saker falcons (Falco cherrug) in Bulgaria.
Petrov R, Andonova Y, Yarkov D, Dicheva A.(2022).Agricultural Science and Technology 14(4):23-29. DOI: 10.15547/ast.2022.04.045

Re-introduction of the Saker Falcon (Falco cherrug) in Bulgaria - preliminary results from the ongoing establishment phase by 2020.
Lazarova, I., Petrov, R., Andonova, Y., Klisurov, I., Dixon, A. (2021). Biodiversity Data Journal, 9(1), e63729

Implications of captive breeding for the reintroduction of the Saker Falcon (Falco cherrug) in Bulgaria.
Petrov R, Andonova Y, Gancheva Y, Klisurov I. (2021). AGRICULTURAL SCIENCE AND TECHNOLOGY, VOL. 13, No 3, pp 300-306

DETAILED REPORT OF THE PILOT(S) ON BYCATCH MONITORING, INCLUDING RECOMMENDATIONS TO FURTHER DEVELOP D1C1 CRITERION. Technical report. 2021.

DETAILED REPORT ON CETACEAN POPULATIONS DISTRIBUTION AND ABUNDANCE IN THE BLACK SEA, INCLUDING PROPOSAL FOR THRESHOLD VALUES. Technical report. 2021.

“Birds of Pomorie Lake – baseline field survey report”, LIFE19 NAT/BG/000804 Technical report. 2021.

Line Transect Surveys of Abundance and Density of Cetaceans in the Marine Area of the Bulgarian Natura 2000 BG0001001 Ropotamo Site of Community Importance, Black Sea. Article. 2021.

MICROPLASTIC POLLUTION OF POMORIE LAKE, BULGARIAN BLACK SEA COAST. Conference paper. 2020.

Pingers as Cetacean Bycatch Mitigation Measure in Bulgarian Turbot Fishery. Article. 2020

Pilot Line-transect Surveys of Cetaceans in a Bulgarian Marine Protected Area: BG0001007 Strandzha Site of Community Importance. Article. 2020


Main mortality factors for the Eastern Imperial Eagle (Aquila heliaca Savigny, 1809) in Bulgaria.
Lazarova I., Dobrev D., Gradev G., Petrov R., Stoychev S., Klisurov I., Demerdzhiev D.  (2020).Ornis Hungarica 28(2): 120-134. https://doi.org/10.2478/orhu-2020-0021

Използване на каракачански коне за управление на тревни местообитания като ловни територии на белошипа ветрушка и царски орел.
Кръстев, Н., Попова, М., Градев, Г., Петров, Р. (2019). Aграрен унивеситет – Пловдив, Студентска научна конференция „Биоикономика, селскостопанство и туризъм за по-добър живот“

Studying of the distribution and abundance of marine mammals in the Bulgarian Black Sea area by combination of visual and acoustic observations, Proceedings of the Institute of Fishing Resources, Volume 28, 2017. Conference paper. 

Guidelines for management of the breeding populations of the Yellow-legged Gull Larus michahellis in the saltpans and coastal wetlands of the Mediterranean (Lignes directrices pour la gestion des populations nidificatrices de Goéland Leucophée Larus michahellis dans les marais salants et dans les zones humides côtières en Méditerranée). Project LIFE10NAT/IT/000256. Technical report. 2016

Guidelines for management of the breeding populations of the Yellow-legged Gull Larus michahellis in the saltpans and coastal wetlands of the Mediterranean (Linee guida per la gestione delle popolazioni nidificanti di Gabbiano reale Larus michahellis nelle saline e nelle zone umide costiere del Mediterraneo). Project LIFE10NAT/IT/000256.Technical report. 2016

Ornitofauna of “Yazovir Ovcharica” SPA.
Dulev, G. Green Balkans. Pp.: 78. (In Bulgarian)

Natural Colonies of Lesser Kestrel (Falco naumanni) in European Turkey and Discussion on the Chances of Natural Re-colonization of the Species in Bulgaria. Elena Kmetova, Pavlin Zhelev, Aleksandar Mechev, Gradimir Gradev, Ivelin Ivanov. Acta zool. bulg., Suppl. 4, 2012:47-54

Results from Marking of Sandwich Terns (Sterna sandvicensis) with Colour Rings and Radio Transmitters at Pomorie Lake.
Dimitar Popov, Doncho Kirov, Pavlin Zhelev. Acta zool. bulg., Suppl. 4, 2012: 147-154

Data from Egyptian Vultures (Neophron percnopterus) Tagged with GPS/GSM Transmitters in Bulgaria.
Gradev, G., V. García, I. Ivanov, P. Zhelev, E. Kmetova. Acta zool. bulg., Suppl. 4, 2012: 141-146

Action Plan for the Conservation of Dalmacian Pelecan (Pelecanus crispus) in Bulgaria 2013 – 2022. (In Bulgarian).
Michev, T., N. Kamburova (Edit.). 2012. Sofia. MoEW.

GIS modeling of natural habitats from Annex I of Directive 92/43/EEC in Bulgaria – methodology and applying in the establishment and management of the protected sites from NATURA 2000 network. (In Bulgarian)
Tzonev, R., Gussev, Ch., Dimitrov, M., Rusakova, V., Lazarova, K., Dimova, D., Belev, T. and Marin, S. 2012.– In: Petrova, A. (ed.), Proc. VII Natl. Conf. Bot., 29–30.09.2011, Sofia, pp. 417-436. Bulg. Bot. Soc., Sofia. ISBN 978-954-92808-2-1. (In Bulgarian)

First results of tracking of Imperial Eagles (Аquila heliaca) tagged with GPS/GSM transmitters in Bulgaria 
Gradev, G., V. Matarranz, E. Dobreva, D. Popov, S. Marin, I. Ivanov, P. Zhelev. Acta zool. bulg., Suppl. 3, 2011: 21-28

First Results of the Tracking of Eastern Imperial Eagles (Aquila heliaca) Tagged with Radio-Transmitters in Bulgaria. Article. 2011.

Increase of the population of the Eastern Imperial Eagle (Aquila heliaca) in Bulgaria.
Demerdzhiev, D., G. Gradev, S. Stoychev, I. Ivanov, Tz. Petrov and S. Marin. 2011. Acta zool. bulg., Suppl. 3, 2011: 41-54

Green Balkans’ experts have been involved in the development of Bulgaria’s Red Data Book (2011.
Golemansky, V (Editor-In-Chief). Red Data Book of Bulgaria. Volume 2, Animals. Sofia. IBER – BAS.) as lead authors for the following species: Black Kite Milvus migrans, Black Vulture Aegypius monachus, Hen Harrier Circus pygargus, Hobby Falco subbuteo, Sandwich Tern Sterna sandicensis, Great Crested Grebe Podiceps cristatus, and Little Grebe Tachybaptus ruficollis, and co-authors of the articles on: White Stork Ciconia ciconia, Pygmy Cormorant Phalacrocorax pygmeus, Griffon Vulture Gyps fulvus, Lesser Kestrel Falco naumanni.

Habitat model for identifying suitable areas for the restoration of a viable population of Lesser Kestrel (Falco naumanni) in Southeastern Bulgaria. Kmetova E. Master of Science thesis, Central European University, Budapest. 2010.

Saker falcon (Falco cherrug) reintroduction in Bulgaria 
Ragyov D., Kmetova E., Dixon A., Kowalczyk K., Koshev Y., Nedialkov N. 2009. Feasibility Study.SESFN. Sofia. 2009.

Data on the Trophic Spectrum of Young Imperial Eagles (Aquila heliaca Savigny, 1809) in South Bulgaria (In Bulgarian).
Pavlin V. Zhelev, Gradimir Zh. Gradev, Ivelin I. Ivanov, Dilian G. Georgiev. Ecologia Balkanica 2009, Vol. 1 November 2009 pp. 51-58

Feeding Activity of Three Bat Species (Mammalia: Chiroptera) in Urban Habitats of Upper Thracian Valley (Bulgaria), Proceedings of the Anniversary Scientific Conference of Ecology, p. 538-542
Slaveya Stoycheva, Dilian Georgiev, Iliana Velcheva, 2008

Seasonality in Marking Activity of the Eurasian Otter (Lutra lutra) in Southern Bulgaria, Proceedings of the Anniversary Scientific Conference of Ecology, p. 236-240
Dilian G. Georgiev, 2008

Diet Composition of the Eurasian Otter and Co-existing Grey Heron in a Fish Farm during the Spring-Summer Season in Bulgaria, Proceedings of the Anniversary Scientific Conference of Ecology, p. 194-199
Dilian G. Georgiev, 2008

Eurasian Otters In Micro Dams Of Southern Bulgaria: Where To Place The Monitoring Zones?
Georgiev, D.G. (2009). IUCN Otter Spec. Group Bull. 26 (1): 5 - 9

Diploma paper on "Ecological and Faunistic Study on Bats (Chiroptera) in the Areas of Plovdiv and Stara Zagora"
Slaveya Stoycheva, “Paisiy Hilendarsky” Plovdiv University, 2008

Field guide to reptiles and amphibians in Bulgaria, 2007 - in Bulgarian (under Green Balkans’ Terms of Reference)

Report on “Biodiversity in Bulgaria – state, management, funding”, 2007

Discovery of a big hibernacula of Noctule bats (Nyctaus noctula (Schreber, 1774) (Chiroptera: Vespertilionidae) in the town of Plovdiv, Bulgaria (in press)

Research on the state of the Otter in “Dospat” State Forestry Department, Western Rhodopes
Yanislav Yanchev (BSPB) and Dilyan Georgiev (Green Balkans), 2007

Diploma paper on “Captive breeding of species of the Falconiformes order" Elena Kmetova, “Paisiy Hilendarsky” Plovdiv University, 2007

Flight activity of Nyctalus noctula bats (Schreber, 1774) (MAMMALIA: CHIROPTERA) close to their winter colonies in the town area of Stara Zagora, Southern Bulgaria  
Dilian Georgiev, Slaveya Stoycheva, 2006.

Assessment of the enforcement of CITES in CEE countries (Bulgaria, Romania, Slovakia, Poland, Croatia), 2005 (in print)

Study on the Home Range of the Resident Female Otter (Lutra lutra), (Carnivora, Mammalia) in South-East Bulgaria
Dilian G. Georgiev, 2007

Otter (Lutra Lutra L.) mortalities in Southern Bulgaria: a case study  
Dilian G. Georgiev, 2007

Concept on the conservation of the habitats of the Otter (Lutra lutra) within NATURA 2000, 2006

Research on the Otter (Lutra lutra) in the sections of the Yantra, Rusensky Lom, Bely Lom, and Cherny Lom rivers and “Mechka” fish-breeding ponds, aimed at expanding the park’s territory and designating new protected areas (under a project of “Rusensky Lom” Natur Park).
Yordan Koshev (“Balkani”) and Dilyan Georgiev (“Green Balkans”), 2006

Concept on the conservation of the habitats of the Ground Squirrel (Spermophilus citellus) within NATURA 2000, 2006. (under Green Balkans’ Terms of Reference)

Habitats, distribution and populatio density otter survey in Western Rodopes mountain (southern Bulgaria), 2006

Freshwater crabs preyed on by the Eurasian Otter Lutra lutra in a river habitat of Southern Bulgaria, 2006

Diet of the Otter Lutra Lutra in different habitats of South-Eastern Bulgaria - Dilian G. Georgiev, 2006

Rhodope Mountains: The Green Belt between Greece and Bulgaria in Terry, A., Ullrich K and Riecken U. (2006) The Green Belt of Europe. From Vision to Reality. IUCN, Gland, Switzerland and Cambridge, UK. Grigoriadis, N., Kmetova, E. 2006

Viability Study for the Reintroduction of the Bearded vulture (Gypaetus barbatus) in the Eastern Balkan Mountains and Royak-Provadia Plateau, 2006

Viability Study for the Reintroduction of the Bearded vulture (Gypaetus barbatus) in the Western Rhodopes, 2006

Diploma paper on “NATURA 2000 European Ecological Network and its establishment in Bulgaria"
Ivelin Ivanov, “Paisiy Hilendarsky” Plovdiv University, 2005

Diploma paper "Winter status and dynamics of the numbers of waterfowl and birds of prey in Ovcharitza Reservoir. Conservation and ornithological significance of the complex"
Georgi Dulev,  “Paisiy Hilendarsky” Plovdiv University, 2005

New information on the distribution of some bat species (Mammalia: Chiroptera) from Bulgaria, 2005

Habitats ot the Otter (Lutra lutra L.) in some regions of Southern Bulgaria
Dilian G. Georgiev, 2005

Concept on the conservation of bat fauna and habitats in Bulgaria within NATURA 2000, 2005. (under Green Balkans’ Terms of Reference)

Concept on the conservation of natural habitats listed in Annex 1 of Directive 92/43/ЕЕС within NATURA 2000 in Bulgaria, 2005. (under Green Balkans’ Terms of Reference)

Distrinution and numbers of the White Stork (Ciconia Ciconia L.) in selected bulgarian municipalities – results of the international census of the species in Bulgaria 2004-2005, 2005

Status of Eastern Imperial Eagle (Aquila heliaca) in Bulgaria - 1994 to 2002  Stoychev, S., I. Ivanov, Tz.Petropv, S.Marin, D.Demerdzhiev, G.Gradev, D.Domuschiev. Raptors Worldwide, WWGBP/MME, 2004: pp. 653-660.

Ornitho-fauna of the fish-breeding pond of Nikolaevo, 2005

Diploma paper on "Natura 2000 in Bulgaria". 2005. Ivanov., I. Plovdiv University “Paisii Hilendarski”. (In Bulgarian)

On the food of the Imperial Eagle Aquila heliaca on Sakar Mountain and Dervent Heights, Bulgaria,
Marin, S., Ivanov, I., Georgiev, D., Boev, Z. Raptors Worldwide, WWGBP/MME, 2004: Pp 589-592

Some data on the roosting sites of ravens (Corvus corax) in Bulgaria - Stoyan Ch. Nikolov, Ivelin Ivanov, Ivailo Angelov

Breeding totals of the ornithofauna in Bulgaria, 2004

Diploma paper on “Conservation and ornithological significance of Nikolaevo fish-breeding ponds. Possibilities for inclusion of the site in NATURA 2000”, Elena Tilova, “Paisiy Hilendarsky” Plovdiv University, 2004

Diploma paper on “Winter concentrations of the threatened Pygmy Cormorant (Phalacrocorax pygmeus) in the vicinity of Plovdiv” 2004

Report in the collection On the Road to Kiev – Implementation of the Pan-European Biological and Landscape Diversity Strategy in Central and Eastern European countries, 2003

Report in the collection On the Road to Kiev - Implementation of international commitments in Central and Eastern European countries, 2003

Report on “Biodiversity conservation in National Development Plans”, 2003

Diploma paper on “Species composition of the ornitho-fauna of the Pomorie Lake, conservation status, and habitat restoration"  
Gradimir Gradev, Agrarian University - Plovdiv, 2003

Diploma paper on “Designation of Protected Areas as a tool for conservation of biological diversity"  
Simeon Marin, “Paisiy Hilendarsky” Plovdiv University, 2003

Assessment of Bulgarian nature conservation policy in the context of the accession of the country to the European union

Report “Evaluating the implementation of international commitments in Central and Eastern Europe”, 2003

Report “Evaluating the implementation of the Pan-European Biological and Landscape Diversity Strategy in Central and Eastern Europe”, 2003

Report “Safeguarding biodiversity in National Development Plans”, 2003

Report “Assessment of the Bulgarian nature-conservation policy in the context of the accession of the country to the European Union”, 2003

Report “Problems of management and development, deriving from the shortcomings of the laws and normative base in the field of landscape and biological diversity and sustainable resource management”, 2002

Report “Problems of managemeent and development deriving from the insufficient development and qualification of capacities (in the context of biological and landscape diversity conservation)”, 2002

Report “Problems of management and development, related to the insufficient development of civil structures in the context of biological and landscape diversity conservation”, 2002

Report “Economic and demographic problems of management and development in the context of landscape and biodiversity conservation”, 2002

Report “Political and regulatory review of potential conflicts among different land-use sectors in aspect of biological diversity and natural resource conservation”, 2002

Report “Recommendations for choosing management models and structures of the future Western Rhodope nature park”, 2002

Research on the food spectrum and the breeding distribution of Imperial Eagle (Aquila heliaca SAVINGY, 1809) in Bulgaria, 2002

The Bearded Vulture in Bulgaria and Macedonia: Monitoring and Conservation. Marin, S., E. Stoynov, I. Ivanov & P. Simeonov 2002. In: LPO/FIR (Ed): Proceedings of the International Conference “Conservation of Bearded Vulture Populations“. Paris. LPO: 50-52.

Report “Biodiversity in the Area of Belene Island, Bulgaria”, 2001

Report “Biodiversity in the Area of Kalimok and Brushlen Marshes, Bulgaria”, 2001

Report “Expected social and economic consequences from wetlands restoration in the area of Belene island, Bulgaria”, 2001

Report “Expected social and economic consequences from wetlands restoration in the area of Kalimok-Brushlen marshes, Bulgaria”, 2001

Report “Analysis of the possible positive and negative impacts on biodiversity in consequence of wetlands restoration in the area of Kalimok-Brushlen marshes and Belene island”, 2001.

Report “Possibilities for Restoration of Bulgarian Wetlands along the Danube – Kalimok and Brushlen Marshes”, 2001

Report on the assessment of the communities on the Belene Island, 2000

Pygmy Cormorant in Bulgaria - state of the population. Action plan, 2000

Bulgarian Nature Conservation Pages Vol. 1, “Concepts of Bulgarian Nature Conservation Organisations for the Biodiversity National Action Plan”, 1999

Bulgarian Nature Conservation Pages Vol. 2, “Concepts of Bulgarian Nature Conservation Organizations for the Biodiversity National Action Plan”, 1999.

Protecting the environment in Bulgaria – joint efforts, 1999

New observations and nesting of the Black Vulture (Aegypius monachus L., 1766) in Bulgaria.
Marin, S., Rogev, A., Christov, I., Sarov, M.1998. In: Tewes, E., J. J. Sanchez, B. Heredia, M. Bijleveld van Lexmond (eds.). The Black Vulture in south eastern Europe. BVCF/FZG, Palma de Mallorca: 47-50.

Report in ‘Snap Shot Survey’ – The 4th Pan-European Conference of Environment Ministers, 1998

An NGO View on the Implementation of the Pan-European Biological and Landscape Diversity Strategy in Bulgaria, Hungary, Latvia, Romania, Slovakia, Ukraine, and in Yugoslavia, 1998

Kalimok Marshes: Combining Natural Resource Conservation with Economic Benefits. A Development Proposal,1997

Results of the White Stork (Ciconia ciconia) Census implemented in the former Stara Zagora Region in the period 1994-1995 – Dobromir Ganev, Simeon Marin, Tseno Petrov, Ivan Savov, Ivelin Ivanov, Petko Petkov, 1997

Kaykusha Marsh Combining Natural Resource Conservation with Economic Benefits: A Development Proposal,1997.

Report by Green Balkans in the National Biological Diversity Conservation Strategy, 1996.

Biodiversity conservation in the area of Maritza Iztok mining complex. Ivanov, I., I. Stoev.1995. (In Bulgarian)

Report of the Green Balkans Movement on the Bulgarian National Biological Diversity Conservation Strategy. Nikolov H.at all.1994. Pp.761-790 In; Meine, c. (ed.) Bulgaria’s Biological Diversity; Conservation status and Needs Assessment, Volumes I and II. 1998. Washington, D.C.: Biodiversity Support Program

Proposal for the formation of protected sites on the territory of “Vratchanska Mountains” National Park – Study of the taxonomic composition and biotope distribution of the terrestrial vertebrate fauna and higher vegetation of the Vratchanska mountains, assessment of the limiting factors and recommendations for its conservation, 1994

Research and conservation of biodiversity of Nikolaevo fishpond.
Ivanov, I., Stoev, I. 1994. (In Bulgarian)

An attempt of a census of the waders in Bulgaria March-May 1990.
Nankinov, D., K. Cvetkova, K. Bedev, G. Lamburov, N. Minchev, V. Bozhilov, S. Marin, G. Seizov, G. Kotsakov. 1990. In: Proc. XII Congress Int. Union Game Biol., Sofia: 38-51.

 First results from the releases of Cinereous Vultures (Aegypius monachus) aiming at re-introducing the species in Bulgaria – the start of the establishment phase 2018–2022.
Ivanov, I., Е. Stoynov, G. Stoyanov, E. Kmetova–Biro, J. Andevski, H. Peshev, S. Marin, J. Terraube, L. Bonchev, I. P. Stoev, J. Tavares, F. Loercher, М. Huyghe, Z. Nikolova, N. Vangelova, S. Stanchev, E. Mitrevichin, E. Tilova, A. Grozdanov. Biodiversity Data Journal. 09.03.2023.