@article{DE_1981_17_4_a0,
     author = {E. E. Barbashina},
     title = {Necessary optimality conditions with matrix impulses},
     journal = {Differencialʹnye uravneni\^a},
     pages = {579--588},
     publisher = {mathdoc},
     volume = {17},
     number = {4},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1981_17_4_a0/}
}