%0 Journal Article %A S. N. Olekhnik %T Properties of~solutions of~some systems of~differential equations %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1979 %P 245-246 %V 34 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1979_34_2_a18/ %G en %F RM_1979_34_2_a18