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@article{TM_1975_127_a8, author = {L. Stupyalis}, title = {Initial-boundary value problems for equations of mixed type}, journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova}, pages = {115--145}, publisher = {mathdoc}, volume = {127}, year = {1975}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TM_1975_127_a8/} }
L. Stupyalis. Initial-boundary value problems for equations of mixed type. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Boundary value problems of mathematical physics. Part 9, Tome 127 (1975), pp. 115-145. http://geodesic.mathdoc.fr/item/TM_1975_127_a8/