Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1960_134_3_a3, author = {Yu. V. Egorov}, title = {Hyperbolic equations with discontinuous coefficients}, journal = {Doklady Akademii Nauk}, pages = {514--517}, publisher = {mathdoc}, volume = {134}, number = {3}, year = {1960}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1960_134_3_a3/} }
Yu. V. Egorov. Hyperbolic equations with discontinuous coefficients. Doklady Akademii Nauk, Tome 134 (1960) no. 3, pp. 514-517. http://geodesic.mathdoc.fr/item/DAN_1960_134_3_a3/