%0 Journal Article
%A Kh. G. Umarov
%T Riemann's method for some hyperbolic equations with constant operator coefficients
%J Doklady Akademii Nauk
%D 1981
%P 549-553
%V 259
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1981_259_3_a9/
%G ru
%F DAN_1981_259_3_a9