%0 Journal Article
%A Kh. G. Umarov
%T Solution by Riemann's method of the Goursat problem for certain hyperbolic equations with variable operator coefficients
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1982
%P 76-79
%N 12
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1982_12_a15/
%G ru
%F IVM_1982_12_a15