%0 Journal Article
%A V. A. Bogachev
%T Investigation of a singular point on the plane in the case of two zero roots
%J Differencialʹnye uravneniâ
%D 1971
%P 1560-1567
%V 7
%N 9
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1971_7_9_a1/
%G ru
%F DE_1971_7_9_a1