%0 Journal Article
%A R. G. Barantsev
%T Two expansion theorems connected with boundary problems for the equation $\psi_{\sigma\sigma}-K(\sigma)\psi_{\theta\theta}=0$
%J Doklady Akademii Nauk
%D 1957
%P 551-554
%V 117
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1957_117_4_a0/
%G ru
%F DAN_1957_117_4_a0