1. Yigit, N., E. Colak, R. Colak, A. Ozluk, N. Gul, P. Cam and F. Saygili, 2011. Biometric and allozymic variations in the genus Dryomys (Rodentia: Gliridae) in Turkey. Acta Zool. Bulgarica, 63: 67-75.
2. Ustunbas, S., R. Colak, G.O. Karacan and E. Colak, 2011. RAPD-PCR analysis of water vole, Arvicola amphibius (Linnaeus, 1758) (Mammalia: Rodentia) distributed in Turkey. J. Anim. Vet. Adv., 10: 1673-1677.
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3. Yigit, N., E. Colak, S. Ozkurt, A. Ozluk, R. Colak, N. Gul, F. Saygili and D. Yuce, 2010. Allozyme variation in wild rats Rattus norvegicus (BERICENHOUT 1769) (Mammalia: Rodentia) from Turkey. Acta Zool. Bulgarica, 62: 79-88.
4. Kankilic, T., T. Kankilic, P.S. Seker, R. Colak, E. Selvi and E. Colak, 2010. Contributions to the karyology and distribution areas of cytotypes of Nannospalax leucodon (Rodentia: Spalacidae) in western anatolia. Acta Zool. Bulgarica, 62: 161-166.
5. Olgun, G., R. Colak, I. Kandemir, E. Colak and N. Yigit, 2009. Genetic variation in rocky mouse, Apodemus mystacinus (Danford and Alston 1877) (Mammalia: Rodentia) in Turkey. Acta. Zool. Bulg., 61: 123-129.
6. Yigit, N., E. Colak, I. Kandemır, T. Kankilic and R. Colak et al., 2008. Allozyme variation in Rattus rattus (Rodentia:Muridae) in Turkey, with particular emphasis on the taxonomy. Zool. Middle East, 45: 19-28.
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7. Yigit, N., T. Kankilic, R. Colak, E. Colak, R. Gattermann et al., 2007. Allozyme Variations and Genetic Differentiation in Mesocricetus brandti Nehring, 1898 and Mesocricetus auratus (Waterhouse, 1839) (Mammalia: Rodentia). Turk. J. Zool., 31: 219-227.
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8. Yigit, N., M.M. Gharkheloo, E. Colak, S. Ozkurt, S. Bulut, T. Kankilic and R. Colak, 2006. The karyotypes of some rodent species (Mammalia: Rodentia) from Eastern Turkey and Northern Iran with a new record, Microtus schidlovskii Argyropulo, 1933, from Eastern Turkey. Turk. J. Zool., 30: 459-464.
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9. Yigit, N., E. Colak, R. Gattermann, K. Neumann, S. Ozkurt, M.M. Gharkheloo, P. Fritzsche and R. Colak, 2006. Morphological and biometrical comparisons of Mesocricetus Nehring, 1898 (Mammalia: Rodentia) species distributed in the Palaearctic Region. Turk. J. Zool., 30: 291-299.
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10. Kankilic, T., T. Kankilic, R. Colak, I. Kandemir and E. Colak, 2006. Morphological comparisons of seven chromosomal forms of Spalax leucodon nordmann, 1840 (Mammalia: Rodentia) in Turkey. Pak. J. Biol. Sci., 9: 2419-2425.
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11. Gozcelioglu, B., E. Colak and R. Colak, 2006. Karyotype of Arvicola terrestris (Mammalia: Rodentia) in Turkish Thrace. Pak. J. Biol. Sci., 9: 2387-2388.
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12. Colak, R., M.M. Gharkheloo and S. Ozkurt, 2006. Distribution and electrophoretic aspects of blood-serum proteins of the genus Spermophilus (Mammalia: Rodentia) in Eastern Turkey and Iran. Pak. J. Biol. Sci., 9: 519-521.
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13. Colak, R., 2006. Importance of superoxide dismutase in distinguishing of Apodemus flavicollis and Apodemus sylvaticus (Mammalia: Rodentia) in Thrace. Pak. J. Biol. Sci., 9: 2153-2155.
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14. Colak, E., N. Yigit, M. Sozen, R. Colak, S. Ozkurt, T. Kankilic and T. Kankilic, 2006. The morphological analysis of Mus domesticus and Mus macedonicus (Mammalia: Rodentia) in Turkey. Turk. J. Zool., 30: 309-317.
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15. Acar, I.O., R. Colak and H.N. Buyukkartal, 2006. Electrophoretic investigation of isoenzymes and soluble proteins between two varieties of Vicia sativa L. seeds. Pak. J. Biol. Sci., 9: 2432-2437.
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16. Kankilic, T., E. Colak, R. Colak and N. Yigit, 2005. Allozyme variation in Spalax leucodon. Nordmann, 1840 (Rodentia: Spalacidae) in the Area between Ankara and Beysehir. Turk. J. Zool., 29: 377-384.
17. Gozcelioglu, B., R. Colak, E. Colak and N. Yigit, 2005. A study on Mus domesticus Rutty, 1772 and Mus macedonicus petrov and ruzic, 1983 (Mammalia: Rodentia ) Distributed along the line of Ankara, Bolu and Zonguldak. Turk. J. Zool., 29: 133-140.
18. Colak, R., E. Colak and N. Yigit, 2005. Morphometric, karyotypic and electrophoretic analysis of the genus Apodemus Kaup, 1826 (Mammalia: Rodentia) in Thrace. Turk. J. Zool., 29: 147-153.
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19. Iyigun, C. and R. Colak, 2004. An electrophoretic study on esterase and blood serum proteins of the water vole Arvicola terrestris (L., 1758) (Mammalia: Rodentia), in Kirsehir province. Turk. J. Biol., 28: 47-53.
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20. Colak, E., N. Yigit, R. Colak, M. Sozen, S. Ozkurt and T. Kankilic, 2004. Taxonomic status and distribution of Apodemus mystacinus (Danford and Alston, 1877) (Mammalia: Rodentia) in Turkey. Turk. J. Zool., 28: 285-294.
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21. Colak, R., N. Yigit, E. Colak, R. Gattermann and K. Neumann, 2002. SDS-PAGE patterns of blood serum proteins in some species of the genus Meriones (Mammalia: Rodentia). Turk. J. Zool., 26: 177-181.
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22. Colak, R., 2002. Electrophoretic aspects of blood serum proteins of the genus Apodemus in the Black Sea Region. Turk. J. Biol., 26: 125-131.
23. Colak, R., 2002. Electrophoretic aspects of blood serum proteins of the genus Apodemus in Northwest Anatolia. G.U. Fen. Bilimleri. Enstitusu. Dergisi., 15: 775-785.
24. Yigit, N., R. Verimli, E. Colak, M. Sozen and S. Ozkurt, 2001. Blood-serum proteins of Rattus rattus and Rattus norvegicus (Mammalia: Rodentia) in Turkey. Turk. J. Biol., 25: 83-88.
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25. Yigit, N., E. Colak, R. Verimli, S. Ozkurt and M. Sozen, 2001. A study on the distribution, morphology and karyology of Tatera indica (Hardwicke, 1807) (Mammalia: Rodentia) in Turkey. Turk. J. Zool., 25: 67-70.
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26. Verimli, R., E. Colak, N. Yigit, M. Sozen and S. Ozkurt, 2001. Blood serum proteins of Apodemus flavicollis and Apodemus hermonensis (Mammalia: Rodentia) in Turkey. Turk. J. Biol., 25: 89-92.
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27. Verimli, R., N. Yigit, E. Colak, M. Sozen and S. Ozkurt, 2000. Nonspecific esterase patterns of Rattus norvegicus (Berkenhout, 1769) in Western Turkey. Turk. J. Biol., 24: 825-831.
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28. Verimli, R., N. Yigit, E. Colak, M. Sozen and S. Ozkurt, 2000. Blood serum proteins of the genus Mesocricetus Nehring, 1898 (Mammalia: Rodentia) in Turkey. Turk. J. Biol., 24: 855-858.
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29. Verimli, R., E. Colak, N. Yigit, M. Sozen and S. Ozkurt, 2000. Electrophoretic aspects of blood-serum proteins of Apodemus mystacinus and Apodemus agrarius (Mammalia: Rodentia) in Turkey. Turk. J. Zool., 24: 225-229.
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