@article{01330900, title = {On the correctness of the Dirichlet problem in a characteristic rectangle for fourth order linear hyperbolic equations.}, journal = {Georgian Mathematical Journal}, volume = {6}, year = {1999}, pages = {447-470}, doi = {10.1023/A:1022928801142}, zbl = {0939.35113}, language = {en}, url = {http://dml.mathdoc.fr/item/01330900} }
Kiguradze, T. On the correctness of the Dirichlet problem in a characteristic rectangle for fourth order linear hyperbolic equations.. Georgian Mathematical Journal, Tome 6 (1999) pp. 447-470. doi : 10.1023/A:1022928801142. http://gdmltest.u-ga.fr/item/01330900/