%0 Journal Article
%A A. M. Tezin
%T Nontopological mapping of the phase plane in the qualitative theory of first order differential equations
%J Differencialʹnye uravneniâ
%D 1972
%P 556-558
%V 8
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1972_8_3_a23/
%G ru
%F DE_1972_8_3_a23