@article{DE_1970_6_4_a8,
     author = {R. Gabasov and F. M. Kirillova},
     title = {On the theory of necessary conditions for higher order optimality},
     journal = {Differencialʹnye uravneni\^a},
     pages = {665--676},
     publisher = {mathdoc},
     volume = {6},
     number = {4},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1970_6_4_a8/}
}