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3. A. I. Egorov, Foundations of Control Theory (Fizmatlit, Moscow, 2004) [in Russian].
4. F. L. Chernous'ko, I. M. Anan'evskii, and S. A. Reshmin, Control Methods for Nonlinear Mechanical Systems (Fizmatlit, Moscow, 2006) [in Russian].
5. N. N. Krasovskii and A. I. Subbotin, Positional Differential Games (Nauka, Moscow, 1974) [in Russian].