@article{01343547,
title = {On the existence and uniqueness of solutions of the Goursat problem for systems of functional partial differential equations of hyperbolic type.},
journal = {Memoirs on Differential Equations and Mathematical Physics},
volume = {17},
year = {1999},
pages = {154-158},
zbl = {0940.35201},
language = {en},
url = {http://dml.mathdoc.fr/item/01343547}
}
Grigolia, M. On the existence and uniqueness of solutions of the Goursat problem for systems of functional partial differential equations of hyperbolic type.. Memoirs on Differential Equations and Mathematical Physics, Tome 17 (1999) pp. 154-158. http://gdmltest.u-ga.fr/item/01343547/