@article{1102706667, author = {El Kohen, A.}, title = {A hyperbolic problem.}, journal = {Pacific J. Math.}, volume = {120}, number = {2}, year = {1985}, pages = { 105-116}, language = {en}, url = {http://dml.mathdoc.fr/item/1102706667} }
El Kohen, A. A hyperbolic problem.. Pacific J. Math., Tome 120 (1985) no. 2, pp. 105-116. http://gdmltest.u-ga.fr/item/1102706667/