%0 Journal Article
%A S. V. Burtsev
%T Theorems on the~existence of an~implicit function in the~theory of necessary and sufficient conditions for an~extremum
%J Sbornik. Mathematics
%D 1995
%P 65-85
%V 82
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1995_82_1_a2/
%G en
%F SM_1995_82_1_a2