@article{DAN_1982_265_4_a7,
     author = {A. A. Kuleshov},
     title = {Necessary conditions for optimality in an optimal control problem for a mixed system},
     journal = {Doklady Akademii Nauk},
     pages = {805--809},
     publisher = {mathdoc},
     volume = {265},
     number = {4},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1982_265_4_a7/}
}