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@article{IVM_1976_8_a11, author = {T. V. Chekmarev}, title = {A~modified {Tricomi} problem for a~system of {Lavrent'ev--Bicadze} equations}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {85--93}, publisher = {mathdoc}, number = {8}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1976_8_a11/} }
T. V. Chekmarev. A~modified Tricomi problem for a~system of Lavrent'ev--Bicadze equations. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 8 (1976), pp. 85-93. http://geodesic.mathdoc.fr/item/IVM_1976_8_a11/