%0 Journal Article
%A G. V. Virabyan
%T The spectrum of a certain operator and Dirichlet's problem for the equation 

%J Doklady Akademii Nauk
%D 1960
%P 986-989
%V 132
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1960_132_5_a3/
%G ru
%F DAN_1960_132_5_a3