%0 Journal Article
%A Hristov, Tsvetan
%A Popivanov, Nedyu
%A Schneider, Manfred
%T Quasi-Regular Solutions for 3D Equations of Tricomi and Keldish Types
%J Mathematics and Education in Mathematics
%D 2012
%P 173-179
%V 41
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MEM_2012_41_1_a15/
%G en
%F MEM_2012_41_1_a15