%0 Journal Article
%A V. F. Ral'chenko
%T Qualitative properties of solutions of a mixed problem
%J Differencialʹnye uravneniâ
%D 1979
%P 1491-1502
%V 15
%N 8
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1979_15_8_a14/
%G ru
%F DE_1979_15_8_a14