@article{DE_1973_9_3_a16,
     author = {R. Gabasov and F. M. Kirillova},
     title = {Necessary optimality conditions of equality type in discrete systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {542--546},
     publisher = {mathdoc},
     volume = {9},
     number = {3},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_3_a16/}
}