%0 Journal Article %A V. A. Pliss %T The behavior of the solutions of a periodic system of two differential equations that has an integral set of zero measure %J Differencialʹnye uravneniâ %D 1972 %P 553-555 %V 8 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1972_8_3_a22/ %G ru %F DE_1972_8_3_a22