%0 Journal Article
%A L. I. Kamynin
%A B. N. Khimchenko
%T Theorems on the sign of a derivative for a second-order elliptic-parabolic equation
%J Differencialʹnye uravneniâ
%D 1984
%P 641-652
%V 20
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1984_20_4_a10/
%G ru
%F DE_1984_20_4_a10