@article{DE_1967_3_3_a6,
     author = {F. M. Kirillova and S. V. Churakova},
     title = {On the problem of controllability of linear systems with aftereffect},
     journal = {Differencialʹnye uravneni\^a},
     pages = {436--445},
     publisher = {mathdoc},
     volume = {3},
     number = {3},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1967_3_3_a6/}
}