%0 Journal Article
%A Yu. A. Volkov
%T Extentions of Darboux--Sauer and Pogorelov theorems
%J Zapiski Nauchnykh Seminarov POMI
%D 1974
%P 63-67
%V 45
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_1974_45_a3/
%G ru
%F ZNSL_1974_45_a3