%0 Journal Article
%A E. R. Avakov
%A A. A. Agrachev
%A A. V. Arutyunov
%T The level set of a~smooth mapping in a~neighborhood of a~singular point, and zeros of a~quadratic mapping
%J Sbornik. Mathematics
%D 1992
%P 455-466
%V 73
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1992_73_2_a8/
%G en
%F SM_1992_73_2_a8