@article{DE_1985_21_4_a8,
     author = {V. P. Panteleev},
     title = {Controllability of time-dependent linear systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {623--628},
     publisher = {mathdoc},
     volume = {21},
     number = {4},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1985_21_4_a8/}
}