%0 Journal Article %A B. N. Petrov %A S. V. Emel'yanov %A N. E. Kostyleva %T Control by linear systems with variable parameters %J Doklady Akademii Nauk %D 1964 %P 61-64 %V 155 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1964_155_1_a15/ %G ru %F DAN_1964_155_1_a15