@article{03693753,
title = {A non-linear hyperbolic equation.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {3},
year = {1980},
pages = {505-520},
doi = {10.1155/S0161171280000385},
zbl = {0444.34060},
language = {en},
url = {http://dml.mathdoc.fr/item/03693753}
}
Henriques de Brito, Eliana. A non-linear hyperbolic equation.. International Journal of Mathematics and Mathematical Sciences, Tome 3 (1980) pp. 505-520. doi : 10.1155/S0161171280000385. http://gdmltest.u-ga.fr/item/03693753/