%0 Journal Article
%A G. Karatoprakliev
%T On certain boundary-value problems for the equation $u_{xx}+\operatorname{sign}y u_{yy}=0$
%J Doklady Akademii Nauk
%D 1963
%P 1253-1256
%V 149
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1963_149_6_a2/
%G ru
%F DAN_1963_149_6_a2