%0 Journal Article %A M. V. Strekopytova %T Investigation of a linear system on a plane %J Differencialʹnye uravneniâ %D 1997 %P 709-711 %V 33 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1997_33_5_a23/ %G ru %F DE_1997_33_5_a23