Abstracting & Coverage

Directory of Open Access Journals (DOAJ)
Directory of Research Journals Indexing (DRJI) 
Index Coupernicus (ICv2012=6.15)
EBSCO
CAB International – CABI Asbtracts
Thomson Reuters Master Journal List - Zoological Record (№4754)
- Thomson Reuters Biological Abstracts (from 2013) 
Thomson Reuters BIOSIS Reviews (from 2013) (№4754)
All-Russian Institute of Scientific and Technical Information (VINITI) (Referativnyi zhurnal)
IMBIOMED
Elsevier (GEOBASE) 
OARE – Research in the Environment (Research4Life)
AGORA – Research in Agriculture (Research4Life)
HINARI – Research in Health (Research4Life)
Journal's Impact Factor (JIF) (from 2014) 
Genamics Journal Seek
Ulrich's Web (ProQuest)
Socol@r (China)
NSDL (The National Science Digital Library)
Academic Keys
Biomedical Research Directory (biores.org)
BASE (Bielefeld Academic Search Engine)
CAPES
E-journals
E-resources (Columbia University Libraries)
KoBSON
MALMAD – Israel Center for Digital Information
Ornithological Worldwide Literature (OWL)
Ovid Link Solver
MediaFinder
SUDOC
SerialSolutions
E-print Network
FreeFullPDF
Ape Journal – Academic Publications eJournal
EZB – Elektronische Zeitschriftenbibliothek – Universitätsbibliothek Regensburg
WorldWideScience
SearchTeam
Social Services Knowledge Scotland
Sjournals Index
CiteFactor 
Research Bible
SiteSeer
InfoBase Index (SINo 115, from 2014) 
Google Scholar Search Engine

Electronic libraries:

Vrije Universiteit Brussel Digital Library (V-link) [Belgium]
Geneva Foundation for Medical Education and Research [Switzerland]
Stanford University Library (SU LAIR) [USA]
The Smithsonian Institution Libraries [USA]
The University of Queensland Library [Australia]
University of Tsukuba Library [Japan]
San Jose State University Library [USA]
Carnegie Mellon University Libraries [USA]
Swansea University Prifysgol Abertawe [UK]
Eastern Michigan University Library [USA]
New York University Libraries [USA]
UTC Lupton Library [USA]
Harowd B. Lee Library [USA]
University of Saskatchewan Library [Canada]
University of York Library [UK]
Hellenic Academic Libraries Link (HEAL-Link) [Greece]
University of Groningen Library [Netherlands]
University of Newcastle [Australia]
University of Washington Libraries [USA]
University of Nevada, Reno [USA]
University Town Library of Shenzhen [China]
Charles Sturt University Library [Australia]
Library of Congress [USA]
Tsukuba Digital Library [Japan]

Regular libraries:

1. Bulgaria, Sofia – National Library "St. St. Cyril and Methodius"
2. Bulgaria, Sofia – University of Sofia Library
3. Bulgaria, Sofia – Bulgarian Academy of Sciences (BAS) Central Library
4. Bulgaria, Sofia – BAS, Institute of Zoology Library
5. Bulgaria, Sofia – New Bulgarian University Library
6. Bulgaria, Plovdiv – National Library "Ivan Vazov"
7. Bulgaria, Plovdiv – University of Plovdiv Central Library
8. Bulgaria, Plovdiv – HIFFI Library
9. Bulgaria, Varna – National Library "Pencho Slaveikov"
10. Bulgaria, Varna – Varna Free University Library
11. Bulgaria, Stara Zagora – Regional Library "Zachariy Kniajevski"
12. Bulgaria, Stara Zagora – Tracian University Library
13. Bulgaria, Burgas – Library "Yavorov PK"
14. Bulgaria, Burgas – Burgas Free University Library
15. Serbia, Beograde – Srpska Akademija Nauka Library
16. Serbia, Nis – University of Nis Library
17. Slovenija, Ljubljana – Biblioteka Slovenskije Akademije
18. Russia, St. Petersburg – Scientific Library of St. Petersburg University
19. Russia, St. Petersburg – Russian Academy of Sciences Library
20. Russia, Voronezh – Voronezh State University – Zonal Scientific Library
21. Russia, Rostov, Rostov State University Scientific Library
22. Russia, Kazan – Scientific Library of Kazan State University
23. Russia, Moscow – Moscow Pedagogical Institute Gosudarstvennnogo Library
24. Russia, Moscow – All-Union Institute of Scientific and Technical Information (VINITI) Library
25. Russia, St. Petersburg – Scientific Research Institute of Plant Protection
26. Russia, St. Petersburg – Scientific Research Institute of Plants
27. Russia, Borok – Institute of Biology of Inland Waters Academy of Sciences Research Library
28. Lithuania, Vilnius – Lithuanian Academy of Sciences Library
29. Georgia, Tbilisi – Scientific Library of the Academy of Sciences of Georgia
30. Armenia, Yerevan – Yerevan State University Library
31. Armenia, Yerevan – Fundamental Library of the Academy of Sciences of Armenia
32. Ukraine, Kiev – Scientific Library of the University of Kiev
33. Ukraine, Kiev – Academy of Sciences of the Ukraine, the Central Scientific Library
34. Ukraine, Kiev – Scientific Library of the Lvovoskogo University
35. Moldova, Chisinau – Central Scientific Library of the Academy of Sciences of Moldova
36. Moldova, Chisinau – Kishinev State University Scientific Library Kazakhstan, Alma-Ata
37. Turkmenistan, Ashgabat – Turkmenistan Central Research Library
38. Tajikistan, Dushanbe – Tajik Academy of Sciences Library
39. Azerbaijan, Baku – Fundamental Library of the Academy of Sciences of Azerbaijan
40. Belarus, Minsk – Central Scientific Library of the Academy of Sciences of Byelorussia
41. Belarus, Minsk – Belarussian State University Library
42. Latvia, Riga – Latvian Academic Library
43. Romania, Galati – Universitati din Galati Library
44. Romania, Bucuresti – Biblioteca Centrala Universitara
45. Romania, Bucuresti – Roumaine de Biologie Institut de Stinte Biologice – Biblioteca
46. Poland,  Krakow – Boblioteka Jagiellonska
47. Poland, Poznan – Uniwersytet im. Adama Mickiewicza – Biblioteca Glowna
48. Poland, Uniwersytet Marii Curie – Skladowskiej – Biblioteca Glowna
49. Poland, Wroclaw – Polskie Towarrystwo Zoologiczne – Biblioteka
50. Czech Republic, Brno – Masaryk University, Faculty of Science, Central Library
51. Czech Republic, Brno – Universitini Knihovna Library
52. Czech Republic, Plzen -  Zapadoceske Museum – Knihovna vymen
53. France, Paris – Biblioteque Centrale du Museum National D`Historie Naturelle
54. France, Paris – Museum National D`Historire Naturelle – Laboratoire de Cryptogamie
55. France, Montpellier – Akademie des Sciences et Letters de Montpellier
56. England, North Yorkshire – Document Control Section – Zoological Record, BIOSIS
57. England, London – The Natural History Museum -  Acquisition Section
58. England, London – The Natural History Museum – General Library
59. Germany, Frankfurt – Senkenberg Natural History Society – Exchange Department
60. Italy, Pisa – Instituto di Entomologia Agraria Dell "Universita Degli Studi" Library
61. Italy, Genova – Museo Civico di Storia Naturale "Giacomo Doria"
62. Belgium, Brussel – Institute Royal des Sciences naturelles de Belgique
63. Switzerland, Bern – Naturhistorisches Museum Library
64. Spain, Barcelona – Museu de Zoologia Library
65. Spain, Barcelona – Institucio Catalona D`Historia Natural Filial de L`Institut D`Estudias Catalans
66. Spain, Museu de Naturals de la Cuitadella Biblioteca
67. Germany, Gottingen – Akademie der Wissenschaften