%0 Journal Article
%A V. F. Kozlov
%T On determining the depth of the zero surface
%J Doklady Akademii Nauk
%D 1966
%P 1068-1069
%V 170
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1966_170_5_a17/
%G ru
%F DAN_1966_170_5_a17