@article{GDZPPN002338149,
title = {On a global in time existence theorem of smooth solutions to an nonlinear wave equation with viscosity.},
journal = {Mathematische Annalen},
volume = {295},
year = {1993},
pages = {215-234},
zbl = {0788.35001},
url = {http://dml.mathdoc.fr/item/GDZPPN002338149}
}
Koboyashi, T.; Pecher, H.; Shibata, Y. On a global in time existence theorem of smooth solutions to an nonlinear wave equation with viscosity.. Mathematische Annalen, Tome 295 (1993) pp. 215-234. http://gdmltest.u-ga.fr/item/GDZPPN002338149/