%0 Journal Article %A B. V. Viktorov %T On the applicability of the method of singular perturbations in the investigation of automatic control systems %J Doklady Akademii Nauk %D 1977 %P 296-299 %V 236 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1977_236_2_a4/ %G ru %F DAN_1977_236_2_a4