%0 Journal Article
%A D. V. Gorbachev
%T An extremum problem on a class of differentiable functions of several variables
%J Matematičeskie zametki
%D 1997
%P 192-205
%V 62
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1997_62_2_a3/
%G ru
%F MZM_1997_62_2_a3