Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1972_205_4_a1, author = {V. P. Didenko}, title = {On boundary-value problems for multidimensional hyperbolic equations with degeneration}, journal = {Doklady Akademii Nauk}, pages = {763--766}, publisher = {mathdoc}, volume = {205}, number = {4}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1972_205_4_a1/} }
V. P. Didenko. On boundary-value problems for multidimensional hyperbolic equations with degeneration. Doklady Akademii Nauk, Tome 205 (1972) no. 4, pp. 763-766. http://geodesic.mathdoc.fr/item/DAN_1972_205_4_a1/