Initial proposal and description of the site made by Simeon Marin - Green Balkans Federation, Plovdiv 4000; R. Tzonev - Sofia University, Ch. Gussev - Institute of Botany, BAS; St. Beshkov - NMNH, Sofia; L. Profirov, Dr. P. Iankov, I. Dimchev, Dr. B. Ivanov - BSPB, Bulgaria, 1111 Sofia, P.O.Box 50, (+359 2) 9715855, fax (+359 2) 9715856, www.bspb.org; M. Dimitrov.Data revised by a team of Bulgarian Academy of Sciences (http://www.bas.bg). New data provided by project "Mapping and assessment of the conservation status of the natural habitats and species - Phase 1" (see link).Initially listed documents:BDZP/BirdLife Balgariya. 2005. Nacionalna banka za ornitologichna informacia 1988-2005, Balgarsko Druzhestvo za zastita na pticite;Botev, B. and Tz. Peshev, (eds). 1985. Red Data Book of Republic Bulgaria. 2: Animals. Sofia: Bulgarian Academy of Science. (In Bulgarian.);Dimitrov, M. 2000. Rezultati ot monitoringa na vodoliubivite ptici v Burgaskite ezera. Burgaski ezera, BSHPOB, 4, 10.; Dimitrov, M., K. Niagolov, L. Profirov. 2000. Gnezdoviat uspeh na vodoliubivite ptici v Burgaskite ezera. Burgaski ezera, BSHPOB, 5, 9.; Dimchev, I. 2003. Monitoring na pticite v Burgaskite ezera. Burgaski ezera, BSHPOB, 9, 6.; Dimchev, I. 2004. Razselvane na cherven anguch v Burgaski region. Burgaski ezera, BSHPOB, 10, 18.; Guidelines for evaluation of protected zones according, which include habitats for birds to art.7, par.3, under the art.6 par.1.3 and 1.4 of the Biodiversity Act. 2005. (In Bulgarian.);Iankov, P. 2002.(red.). Svetovno zastrasheni vidove ptici v Bulgaria. Nacionalni planove za dejstvie za opazvaneto im. Chast 1. BDZP-MOSV, Prirodozashtitna poredica, Kn. 4, Sofia: 204-219.; Kostadinova, I. (sust.) 1997. Ornitologichno vazhni mesta v Bulgaria. BDZP, Prirodozashtitna poredica. Kniga 1, BDZP, Sofia, 176 s.; Marinov, M. 1995. Novo gnezdovo nahodishte na sablekliun (Recurvirostra avosetta) Neophron, 1, 18.; MOSV. 2005. Arhiv na zastitenite teritorii v Balgaria. Baza danni (nepubl.)Nikolov, Hr., S. Marin, A. Darakchiev. 1999. Malkiat kormoran v Bulgaria. Razprostranenie, chislenost I zaplahi. Nauch. Tr. Plov. Univ., Animalia, 35, 6, 67-81.; Niagolov, K. 2000a. Belochela ribarka (Sterna albifrons). Burgaski ezera, BSHPOB, 5, 7.; Niagolov, K. 2000c. Nova sreshta s bivolskata chapla. Burgaski ezera, BSHPOB, 5, 11.;Petkov, N. 1997a. Kachulata potapnica (Aythya fuligula). Za pticite, 2 (esen/zima), 13.;Petkov, N. 1997b. Suvremenno sustoianie na belookata potapnica (Aythya nyroca) v Bulgaria. Diplomna rabota, Biologicheski Fakultet pri SU Sv. Kl. Ohridski, Sofia, 104 s.; Petrov, .C 1997b. Beliat shturkel (Ciconia ciconia) v Bulgaria. Prirodozashtitna poredica, Kniga 2, BDZP, Plovdiv.; BSBCP. 2000. Draft management Plan Plan of Vaya Protected area, BSBCP, 82pp.BirdLife International. 2000. Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, 695pp.Birdlife International. 2004. Birds in Europe: Population estimates, trends and conservation status. Cambridge, UK: Birdlife International (Birdlife Conservation Series No. 12).373pp.;BSPB/BirdLife International. 2005. World Bird Database Important Birds Areas.Bulgaria. Cambridge. (unpublished);Dimitrov, M, D. Georgiev, S. Mikhov, S. Dereliev, I. Kostadinova, 2003. Bulgaria. In: Marushevsky, G., Directory of Azov-Black Sea Coastal Wetlands. Wetlands International, Kyiv, 16-45;Dimitrov, M., I. Kostadinova, 2003. Information Sheet on Ramsar Wetlands. Vaya Lake. Sofia, Unpublished ;Dimitrov, M., T. Michev, L. Profirov, K. Nyagolov. 2005. Waterbirds of Bourgas Wetlands.Results and evaluation of the monthly waterbird monitoring 1996 2002. Pensoft, 159 p.; Grimmet, R. F. A., R. T. A. Jones. 1989. Important Bird Areas in Europe. Cambridge, U.K.: ICBP (ICBP Technical Publication No9);Heath, M.F. and Evans, M.I., eds. 2000. Important Bird Areas in Europe: Priority sites for conservation, vol. 2 Southern Europe. Cambridge, UK: BirdLife International (BirdLife Conservation Series No. 8).;Iankov, P., N. Petkov, A. Kovachev, D. Plachiisky. (in print). Pygmy Cormorant in Bulgaria 2001/2002. Final Report. BSHPOB; Kostadinova, I., S.Dereliev. 2001. Results the Mid-Winter Counts of Waterbirds in Bulgaria for the period 1997- 2001. BSPB Conservation Series. Book 3, BSPB, Sofia, BG;Kostadinova, I., M. Mihailov, (comp.) 2002. Guide for NATURA 2000 in Bulgaria. BSPB nature conservation series No5. BSPB, Sofia, 80pp. (In Bulgarian.);Kostadinova, I. 2005. Application of C criteria for Identification of Important Bird Areas of European Union importance in Bulgaria. Preliminarily implementation and analysis of the gaps. In: Petrova, A. (ed.), Current state of Bulgarian biodiversity problems and perspectives. Pp. 533-548. Bulgarian Bioplatform, SofiaMichev, T., Tz. Petrov, L. Profirov. 1989. Status, breeding, distribution, numbers and conservation of the White Stork in Bulgaria; MOEW. 1998. CORINE Biotopes Database of the sites of European Importance for the biodiversity. Bulgaria, MOSV (nepubl.);Nankinov, D., S. Dalakchieva, K. Popov, S. Kirilov. 2002. Die Geschichte der Rostflugel-Brachschwalbe Glareola pratincola in Bulgarien. Orn. Mitt., 54, 7/8: 234-242. Osieck, E. 2000 Filling in the requirements of the EU Birds Directive: Lessons from the Dutch Case. In: European IBA Workshop. 29 March - 2 April 2000, Brussels, Belgium. Proceedings. BirdLife International, 86-99;Petkov, N. 1998a. Current Status of the Ferruginous Duck (Aythya nyroca) in Bulgaria. Partimadar, 6-7, MME, Budapest, 4449.; Waliczky, Z. 2000 Important Bird Areas of European Union Importance: explanation of the EU Criteria applied in IBA 2000 In: European IBA Workshop. 29 March - 2 April 2000, Brussels, Belgium. Proceedings. 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