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2. N. N. Krasovskii and A. I. Subbotin, Positional Differential Games (Nauka, Moscow, 1974) [in Russian].
3. R. Isaacs, Differential Games (Wiley, New York, 1965).
4. A. B. Kurzhanskii, Control and Observation under Uncertainty (Nauka, Moscow, 1977) [in Russian].
5. A. B. Kurzhanski and I. Vályi, Ellipsoidal Calculus for Estimation and Control (Birkhäuser, Boston, 1997).