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@article{TM_1973_125_a13, author = {L. Stupyalis}, title = {Boundary value problems for elliptic-hyperbolic equations}, journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova}, pages = {211--229}, publisher = {mathdoc}, volume = {125}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TM_1973_125_a13/} }
L. Stupyalis. Boundary value problems for elliptic-hyperbolic equations. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Boundary value problems of mathematical physics. Part 8, Tome 125 (1973), pp. 211-229. http://geodesic.mathdoc.fr/item/TM_1973_125_a13/