TY  - JOUR
AU  - J. Kisyński
TI  - On second order hyperbolic equation with two independent variables
JO  - Colloquium Mathematicum
PY  - 1970
SP  - 135
EP  - 151
VL  - 22
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm-22-1-135-151/
DO  - 10.4064/cm-22-1-135-151
LA  - en
ID  - 10_4064_cm_22_1_135_151
ER  -