@article{DE_1973_9_3_a18,
     author = {E. E. Barbashina},
     title = {Necessary optimality conditions of {Kopp--Moyer} type for the case of a closed control domain},
     journal = {Differencialʹnye uravneni\^a},
     pages = {549--552},
     publisher = {mathdoc},
     volume = {9},
     number = {3},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_3_a18/}
}