@article{01180644,
title = {Global classical solutions to the Cauchy problem for a nonlinear wave equation.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {21},
year = {1998},
pages = {533-548},
doi = {10.1155/S016117129800074X},
zbl = {0908.35080},
language = {en},
url = {http://dml.mathdoc.fr/item/01180644}
}
Clark, Haroldo R. Global classical solutions to the Cauchy problem for a nonlinear wave equation.. International Journal of Mathematics and Mathematical Sciences, Tome 21 (1998) pp. 533-548. doi : 10.1155/S016117129800074X. http://gdmltest.u-ga.fr/item/01180644/