@article{DAN_1986_291_3_a10,
     author = {Yu. V. Orlov},
     title = {The maximum principle for control systems described by},
     journal = {Doklady Akademii Nauk},
     pages = {560--562},
     year = {1986},
     volume = {291},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1986_291_3_a10/}
}