1. Bensuassan, A. and Lions, J.L., Controle Impulsionel et Inequitions Quasivariationelles, Dunod, 1987.
2. Lions, J.L., Controle des Systemes Distributes Singuliers, Gauthier, Willars, 1987.
3. Miller, B.M., Optimality Conditions in the Problems of Generalized Control. 1. The Necessary Conditions of the Optimality. 2. Sufficient Conditions of the Optimality, AiT, 1992, no. 3, p. 50–58, no. 4, p. 39–48.
4. Kolokolnikova, G.A., Necessary Conditions of the Second Order Optimality of Special and Impulse Modes, AiT, 1990, no. 6, p. 48–57.
5. The Control Handbook, Levine, W.S., Ed., CDC Press, IEEE Press, 1996.