@article{bwmeta1.element.desklight-569ce4de-28a2-4b88-b1b3-a64ca7429cef,
author = {J. Kisy\'nski},
title = {On second order hyperbolic equation with two independent variables},
journal = {Colloquium Mathematicae},
volume = {22},
year = {1970},
pages = {135-151},
zbl = {0206.39905},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.desklight-569ce4de-28a2-4b88-b1b3-a64ca7429cef}
}
J. Kisyński. On second order hyperbolic equation with two independent variables. Colloquium Mathematicae, Tome 22 (1970) pp. 135-151. http://gdmltest.u-ga.fr/item/bwmeta1.element.desklight-569ce4de-28a2-4b88-b1b3-a64ca7429cef/