%0 Journal Article %A V. N. Gorbuzov %T Qualitative investigation in the large of a system in the case of a pole at infinity %J Differencialʹnye uravneniâ %D 1982 %P 748-753 %V 18 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1982_18_5_a2/ %G ru %F DE_1982_18_5_a2