@article{04122483, title = {On the exponential growth of solutions to nonlinear hyperbolic equations.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {12}, year = {1989}, pages = {539-545}, doi = {10.1155/S0161171289000670}, zbl = {0685.35069}, language = {en}, url = {http://dml.mathdoc.fr/item/04122483} }
Chi, H.; Poorkarimi, H.; Wiener, J.; Shah, S.M. On the exponential growth of solutions to nonlinear hyperbolic equations.. International Journal of Mathematics and Mathematical Sciences, Tome 12 (1989) pp. 539-545. doi : 10.1155/S0161171289000670. http://gdmltest.u-ga.fr/item/04122483/