%0 Journal Article %A È. I. Grudo %A A. K. Demenchuk %T On periodic solutions with incommensurable periods of linear inhomogeneous periodic differential systems %J Differencialʹnye uravneniâ %D 1987 %P 409-416 %V 23 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1987_23_3_a4/ %G ru %F DE_1987_23_3_a4