%0 Journal Article
%A R. I. Bogdanov
%T Versal deformations of a singular point of a vector field on the plane in the case of zero eigenvalues
%J Funkcionalʹnyj analiz i ego priloženiâ
%D 1975
%P 63
%V 9
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FAA_1975_9_2_a9/
%G ru
%F FAA_1975_9_2_a9