%0 Journal Article
%A V. A. Baltag
%A N. I. Vulpe
%T The number and multiplicity of singular points of a quadratic
%J Doklady Akademii Nauk
%D 1992
%P 9-12
%V 323
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1992_323_1_a0/
%G ru
%F DAN_1992_323_1_a0