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@article{TRSPY_1973_126_a5, author = {V. I. Chekhlov}, title = {A mixed problem with a discontinuous boundary operator for a hyperbolic equation}, journal = {Informatics and Automation}, pages = {171--223}, publisher = {mathdoc}, volume = {126}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1973_126_a5/} }
V. I. Chekhlov. A mixed problem with a discontinuous boundary operator for a hyperbolic equation. Informatics and Automation, Boundary value problems for differential equations. Part III, Tome 126 (1973), pp. 171-223. http://geodesic.mathdoc.fr/item/TRSPY_1973_126_a5/