%0 Journal Article
%A J. Kisyński
%T On second order hyperbolic equation with two independent variables
%J Colloquium Mathematicum
%D 1970
%P 135-151
%V 22
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/cm-22-1-135-151/
%R 10.4064/cm-22-1-135-151
%G en
%F 10_4064_cm_22_1_135_151