%0 Journal Article %A E. K. Makarov %T The effect of Lyapunov transforms and different perturbations on the nonregularity sets of linear differential systems %J Differencialʹnye uravneniâ %D 1992 %P 1708-1715 %V 28 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1992_28_10_a5/ %G ru %F DE_1992_28_10_a5