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@article{DAN_1968_183_4_a13, author = {V. I. Chekhlov}, title = {A mixed problem with discontinuous boundary conditions for the wave equation}, journal = {Doklady Akademii Nauk}, pages = {787--790}, publisher = {mathdoc}, volume = {183}, number = {4}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1968_183_4_a13/} }
V. I. Chekhlov. A mixed problem with discontinuous boundary conditions for the wave equation. Doklady Akademii Nauk, Tome 183 (1968) no. 4, pp. 787-790. http://geodesic.mathdoc.fr/item/DAN_1968_183_4_a13/