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2. A. I. Egorov, Optimal Control of Thermal and Diffusion Processes [in Russian], Nauka, Moscow (1978).
3. A. I. Egorov, Fundamentals of Control Theory [in Russian], Fizmatgiz, Moscow (2004).
4. M. Z. Zgurovskii, V. V. Skopetskii, V. K. Khrushch, and N. N. Belyaev, Numerical Modeling of the Propagation of Contamination in the Environment [in Russian], Naukova Dumka, Kyiv (1997).
5. I. V. Sergienko, V. V. Skopetskii, and V. S. Deineka, Mathematical Modeling and Analysis of Processes in Inhomogeneous Media [in Russian], Naukova Dumka, Kyiv (1991).