%0 Journal Article %A R. G. Grabovskaya %T The asymptotic behavior of the solution of a system of two first order nonlinear differential equations %J Differencialʹnye uravneniâ %D 1975 %P 639-644 %V 11 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1975_11_4_a4/ %G ru %F DE_1975_11_4_a4