@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/