Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1986_290_2_a9, author = {Ya. A. Roitberg}, title = {The {Cauchy} problem for hyperbolic equations in a full scale of spaces of {Sobolev} type}, journal = {Doklady Akademii Nauk}, pages = {296--300}, publisher = {mathdoc}, volume = {290}, number = {2}, year = {1986}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1986_290_2_a9/} }
Ya. A. Roitberg. The Cauchy problem for hyperbolic equations in a full scale of spaces of Sobolev type. Doklady Akademii Nauk, Tome 290 (1986) no. 2, pp. 296-300. http://geodesic.mathdoc.fr/item/DAN_1986_290_2_a9/