@article{04196556, title = {Existence and uniqueness of solutions of nonlocal problems for hyperbolic equation }, journal = {Journal of Applied Mathematics and Stochastic Analysis}, volume = {3}, year = {1990}, pages = {163-168}, doi = {10.1155/S1048953390000156}, zbl = {0725.35059}, language = {en}, url = {http://dml.mathdoc.fr/item/04196556} }
Byszewski, L. Existence and uniqueness of solutions of nonlocal problems for hyperbolic equation . Journal of Applied Mathematics and Stochastic Analysis, Tome 3 (1990) pp. 163-168. doi : 10.1155/S1048953390000156. http://gdmltest.u-ga.fr/item/04196556/