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@article{DAN_1971_199_2_a6, author = {V. I. Plotnikov}, title = {Necessary conditions of optimality for control systems of general type}, journal = {Doklady Akademii Nauk}, pages = {275--278}, publisher = {mathdoc}, volume = {199}, number = {2}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1971_199_2_a6/} }
V. I. Plotnikov. Necessary conditions of optimality for control systems of general type. Doklady Akademii Nauk, Tome 199 (1971) no. 2, pp. 275-278. http://geodesic.mathdoc.fr/item/DAN_1971_199_2_a6/