@article{1077315230, author = {Beals, Michael}, title = {Spreading of singularities for a semilinear wave equation}, journal = {Duke Math. J.}, volume = {49}, number = {1}, year = {1982}, pages = { 275-286}, language = {en}, url = {http://dml.mathdoc.fr/item/1077315230} }
Beals, Michael. Spreading of singularities for a semilinear wave equation. Duke Math. J., Tome 49 (1982) no. 1, pp. 275-286. http://gdmltest.u-ga.fr/item/1077315230/