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@article{IVM_1980_5_a13, author = {T. V. Chekmarev}, title = {Solution of {a~Darboux} problem by reducing it to {a~Goursat} problem}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {67--72}, publisher = {mathdoc}, number = {5}, year = {1980}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1980_5_a13/} }
T. V. Chekmarev. Solution of a~Darboux problem by reducing it to a~Goursat problem. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 5 (1980), pp. 67-72. http://geodesic.mathdoc.fr/item/IVM_1980_5_a13/