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  1. By: Spassov, Nikolaï
    Type: Article
    In: Historia naturalis bulgarica
    Volume: 12
    Date: 2000
    Page Range: 89--128
    Publication Info: Sofiia, Bulgarska akademiia na naukite, c1989-
  2. By: Spassov, Nikolaï - Acosta-Pankov, Ilya
    Type: Article
    In: Biodiversity data journal
    Volume: 7
    Date: 2019-05-09
    Page Range: 1--22
    Publication Info: Sofia Pensoft Publishers [2013]-
  3. By: Spassov, Nikolaï
    Type: Article
    In: Historia naturalis bulgarica
    Volume: 7
    Date: 1997
    Page Range: 109--113
    Publication Info: Sofiia, Bulgarska akademiia na naukite, c1989-
  4. By: Spassov, Nikolaï - Koufos, George D
    Type: Article
    In: Mitteilungen der Bayerischen Staatssammlung für Paläontologie und Histor. Geologie
    Volume: 42
    Date: 2002
    Page Range: 83--101
    Publication Info: München, Bayerische Staatssammlung für Paläontologie und Historische Geologie,
  5. By: Spassov, Nikolaï - Raychev, Dimitar
    Type: Article
    In: Historia naturalis bulgarica
    Volume: 7
    Date: 1997
    Page Range: 71--96
    Publication Info: Sofiia, Bulgarska akademiia na naukite, c1989-
  6. By: Spassov, Nikolaï
    Type: Article
    In: Historia naturalis bulgarica
    Volume: 9
    Date: 1998
    Page Range: 101--113
    Publication Info: Sofiia, Bulgarska akademiia na naukite, c1989-
  7. By: Spassov, Nikolaï
    Type: Article
    In: Historia naturalis bulgarica
    Volume: 2
    Date: 1990
    Page Range: 64--66
    Publication Info: Sofiia, Bulgarska akademiia na naukite, c1989-
  8. By: Spassov, Nikolaï
    Type: Article
    In: Historia naturalis bulgarica
    Volume: 2
    Date: 1990
    Page Range: 61--63
    Publication Info: Sofiia, Bulgarska akademiia na naukite, c1989-
  9. By: De Jong, Yde - Kouwenberg, Juliana - Boumans, Louis - Hussey, Charles - Hyam, Roger - Nicolson, Nicola - Kirk, Paul - Paton, Alan - Michel, Ellinor - Guiry, Michael Dominic - Boegh, Phillip - Pedersen, Henrik - Enghoff, Henrik - Von Raab-Straube, Eckhard - Güntsch, Anton - Geoffroy, Marc - Müller, Andreas - Kohlbecker, Andreas - Berendsohn, Walter - Appeltans, Ward - Arvanitidis, Christos - Vanhoorne, Bart - Declerck, Joram - Vandepitte, Leen - Hernández, Francisco, - Nash, Róisín - Costello, Mark - Ouvrard, David - Bezard-Falgas, Pascale - Bourgoin, Thierry, - Wetzel, Florian - Glöckler, Falko - Korb, Günther - Ring, Caroline - Hagedorn, Gregor - Hauser, Christoph - Aktac, Nihat - Asan, Ahmet - Ardelean, Adorian - Borges, Paulo - Dhora, Dhimiter - Khachatryan, Hasmik - Malicky, Michael - Ibrahimov, Shaig - Tuzikov, Alexander - De Wever, Aaike - Moncheva, Snejana - Spassov, Nikolaï - Chobot, Karel - Popov, Alexi, - Boršić, Igor - Sfenthourakis, Spyros - Kõljalg, Urmas, - Uotila, Pertti - Gargominy, Olivier - Dauvin, Jean-Claude - Tarkhnishvili, David - Chaladze, Giorgi - Tuerkay, Michael - Legakis, Anastasios - Peregovits, László - Gudmundsson, Gudmundur - Ólafsson, Erling - Lysaght, Liam - Galil, Bella - Raimondo, Francesco - Domina, Gianniantonio - Stoch, Fabio - Minelli, Alessandro - Spungis, Voldermars - Budrys, Eduardas - Olenin, Sergej - Turpel, Armand - Walisch, Tania - Krpač, Vladimir T - Gambin, Marie - Ungureanu, Laurentia - Karaman, Gordan - Kleukers, Roy - Stur, Elisabeth - Aagaard, Kaare. - Valland, Nils - Moen, Toril - Bogdanowicz, Wiesław. - Tykarski, Piotr - Węsławski, Jan - Kędra, Monika - M. De Frias Martins, Antonio - Abreu, António - Silva, Ricardo - Medvedev, Sergei - Ryss, Alexander - Šimić, Smiljka - Marhold, Karol - Stloukal, Eduard - Tome, Davorin - Ramos, Marian - Valdés, Benito - Pina, Francisco - Kullander, Sven Oscar, - Telenius, Anders - Gonseth, Yves - Tschudin, Pascal - Sergeyeva, Oleksandra - Vladymyrov, Volodymyr - Rizun, Volodymyr - Raper, Chris - Lear, Dan - Stoev, Pavel - Penev, Lyubomir - Rubio, Ana - Backeljau, Thierry - Saarenmaa, Hannu - Ulenberg, Sandrine
    Type: Article
    In: Biodiversity data journal
    Volume: 3
    Date: 2015-09-28
    Page Range: 1--51
    Publication Info: Sofia Pensoft Publishers [2013]-
  10. By: Markov, Georgi - Spassov, Nikolaï - Simeonovski, Velizar
    Type: Article
    In: Historia naturalis bulgarica
    Volume: 14
    Date: 2002
    Page Range: 141--144
    Publication Info: Sofiia, Bulgarska akademiia na naukite, c1989-
  11. By: Spassov, Nikolaï - Ivanova, Nevena - Georgiev, Kiril - Ivanov, Vasil
    Type: Article
    In: Historia naturalis bulgarica
    Volume: 14
    Date: 2002
    Page Range: 123--140
    Publication Info: Sofiia, Bulgarska akademiia na naukite, c1989-
  12. By: Spassov, Nikolaï - Georgiev, Kiril - Ivanov, Vasil - Stoev, Pavel
    Type: Article
    In: Historia naturalis bulgarica
    Volume: 10
    Date: 1999
    Page Range: 133--146
    Publication Info: Sofiia, Bulgarska akademiia na naukite, c1989-
  13. By: Spassov, Nikolaï - Simeonovski, Velizar - Spiridonov, Geko
    Type: Article
    In: Historia naturalis bulgarica
    Volume: 8
    Date: 1997
    Page Range: 101--120
    Publication Info: Sofiia, Bulgarska akademiia na naukite, c1989-