Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1968_183_4_a3, author = {V. L. Dubnov}, title = {Maslov's canonical operator for hyperbolic equations}, journal = {Doklady Akademii Nauk}, pages = {754--757}, publisher = {mathdoc}, volume = {183}, number = {4}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1968_183_4_a3/} }
V. L. Dubnov. Maslov's canonical operator for hyperbolic equations. Doklady Akademii Nauk, Tome 183 (1968) no. 4, pp. 754-757. http://geodesic.mathdoc.fr/item/DAN_1968_183_4_a3/