1. L. S. Pontryagin, Selected Scientific Works (Nauka, Moscow, 1988), Vol. 2 [in Russian].
2. N. N. Krasovskii, Game Problems on the Encounter of Motions (Nauka, Moscow, 1970) [in Russian].
3. A. B. Kurzhanskii, Control and Observation under Uncertainty (Nauka, Moscow, 1977) [in Russian].
4. A. Kurzhanski and I. Valyi, Ellipsoidal Calculus for Estimation and Control (Birkhäuser, Boston, 1997).
5. B. N. Pshenichnyi, Convex Analysis and Extremal Problems (Nauka, Moscow, 1980) [in Russian].