%0 Journal Article
%A A. A. Gavrilov
%A O. M. Penkin
%T An analog of the lemma on the normal derivative for an elliptic equation on a stratified set
%J Differencialʹnye uravneniâ
%D 2000
%P 226-232
%V 36
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_2000_36_2_a10/
%G ru
%F DE_2000_36_2_a10