Kovalev, A. Et Al. Long-term changes in the Black Sea zooplankton:the role of natural and anthropogenic factors. 1998. In Ecosystem Modeling as a Management Toll for the Black Sea , Kluwer Academic Publishers, Dordrecht, 221234.

Kovalev, A., Niermann, U., Melnikov, V., Belokopytov, V., UYSAL, Z., KIDEYŞ, A. E., ... Ünsal, M.(1998). Long-term changes in the Black Sea zooplankton:the role of natural and anthropogenic factors. Ecosystem Modeling as a Management Toll for the Black Sea (pp.221234), Dordrecht: Kluwer Academic Publishers.

Kovalev, AV Et Al. "Long-term changes in the Black Sea zooplankton:the role of natural and anthropogenic factors." In Ecosystem Modeling as a Management Toll for the Black Sea , 221234. Dordrecht: Kluwer Academic Publishers, 1998

Kovalev, AV Et Al. "Long-term changes in the Black Sea zooplankton:the role of natural and anthropogenic factors." Ecosystem Modeling as a Management Toll for the Black Sea , Kluwer Academic Publishers, 1998, pp.221234.

Kovalev, A. Et Al. (1998) "Long-term changes in the Black Sea zooplankton:the role of natural and anthropogenic factors", Ecosystem Modeling as a Management Toll for the Black Sea . Dordrecht: Kluwer Academic Publishers.

@bookchapter{bookchapter, author ={AV Kovalev Et Al. }, chaptertitle={Long-term changes in the Black Sea zooplankton:the role of natural and anthropogenic factors}, booktitle={ Ecosystem Modeling as a Management Toll for the Black Sea}, publisher={Kluwer Academic Publishers}, city={Dordrecht},year={1998} }