1. |
V. S. Krotova, “Differentiation of a state with respect to control for systems described by singular integral equations with a controllable domain of definition”, Izv. Vyssh. Uchebn. Zaved. Mat., 1985, no. 5, 69–71 ; Soviet Math. (Iz. VUZ), 29:5 (1985), 85–88 |