%0 Journal Article
%A N. P. Erugin
%T The analytic and the qualitative theory, and also the asymptotic behavior of the solutions of the system $dx/dz=2\surd P(x,y)/z$, $dy/dz=2$ $\surd P(x,y)/(1-z)$. I
%J Differencialʹnye uravneniâ
%D 1974
%P 963-995
%V 10
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1974_10_6_a0/
%G ru
%F DE_1974_10_6_a0