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@article{DAN_1978_239_4_a4, author = {V. Ya. Ivrii}, title = {The propagation of singularities of a solution of the wave equation near a boundary}, journal = {Doklady Akademii Nauk}, pages = {772--774}, publisher = {mathdoc}, volume = {239}, number = {4}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1978_239_4_a4/} }
V. Ya. Ivrii. The propagation of singularities of a solution of the wave equation near a boundary. Doklady Akademii Nauk, Tome 239 (1978) no. 4, pp. 772-774. http://geodesic.mathdoc.fr/item/DAN_1978_239_4_a4/