1. Yu. P. Zaitsev, G. P. Garkavaya, D. A. Nesterova, and L. N. Polishchuk, Gidrobiol. Zh. 25 (4), 21–23 (1989) [in Russian].
2. L. D. Mee, Ambio 21, 278–286 (1992).
3. Y. P. Zaitsev, in Etudes et Revue-Conseil General des Peches pour la Mediterranee (FAO, 1994).
4. S. W. Nixon, Ophelia 41 (1), 199–219 (1995). https://doi.org/10.1080/00785236.1995.10422044
5. Y. P. Zaitsev and B. G. Alexandrov, in Sensitivity to Change: Black Sea, Baltic Sea and North Sea, Ed. by E. Özsoy and A. Mikaelyan (Springer, Dordrecht, 1997), pp. 25–31.