1. Ajiad, A., Jakobsen, T., and Nakken, O., Sexual difference in maturation of northeast arctic cod, J. Northw. Atl. Fish. Sci., 1999, vol. 25, pp. 1–15.
2. Andriyashev, A.P., Ryby severnykh morei SSSR (Fishes of the Northern Seas of USSR), Moscow: Akad. Nauk SSSR, 1954.
3. Beacham, T.D., Variability in median size and age at sexual maturity of Atlantic cod, Gadus morhua, on the Scotian Shelf in the northwest Atlantic Ocean, Fish. Bull., 1983, vol. 81, pp. 303–321.
4. Biryukov, N.P., Baltiiskaya treska (The Baltic Cod), Kaliningrad: Atl. Nauchno-Issled. Inst. Rybn. Khoz. Okeanogr., 1970.
5. Brazhnik, S.Y., Strelnikov, A.S., and Pshenichny, K.V., Changes of growth characteristics of bream (Abramis brama L.) in Rybinsk reservoir depending on living conditions, Vopr. Rybolob., 2008, no. 3, pp. 595–607.