%0 Journal Article %A V. I. Blagodatskikh %T The controllability problem for linear systems %J Informatics and Automation %D 1977 %P 57-67 %V 143 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1977_143_a3/ %G ru %F TRSPY_1977_143_a3