Panov Е.N., Zykova L.Yu. (1987). Influence ecologically and social factors to reproductive success at great black-headed gull (Larus ichthyaetus). Zoological magazine, Vol.66, Issue 6: 883-894. (in russian).
Panov Е.N., Zykova L.Yu., Grabovsky V. I (1990). Nesting biology, behavior and taxonomy of Larus cachinnans. 1. Spatial structure and behavioral aspects of nested biology. Zoological magazine, Vol.69, Issue.12: 92-104. (in russian).