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2. A. M. Bronfman, V. G. Dubinina, and G. D. Makarova, Hydrobiological and Hydrochemical Fundamentals of Productivity of the Sea of Azov (Pishchevaya Promyshlennost’, Moscow, 1979) [in Russian].
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4. V. V. Ivanov, V. N. Korotaev, N. A. Rimskii-Korsakov, A. A. Pronin, and A. V. Chernov, “The Structure of the Floodplain and the Dynamics of the Lower Don Riverbed,” Vestnik Moskovskogo Un-ta. Ser. 5: Geografiya, No. 5 (2013) [in Russian].
5. V. G. Il’ichev, “Convex Structures in Ecological Models,” Matematicheskoe Modelirovanie, No. 4, 19 (2007) [in Russian].