@article{DAN_1988_301_3_a7,
     author = {K. B. Mansimov},
     title = {On the theory of necessary conditions for optimality in a control},
     journal = {Doklady Akademii Nauk},
     pages = {546--550},
     publisher = {mathdoc},
     volume = {301},
     number = {3},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1988_301_3_a7/}
}