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@article{IVM_1996_6_a0, author = {I. A. Bikchantaev}, title = {The {Riemann} problem with a degenerate coefficient on a {Riemann} surface}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {3--4}, publisher = {mathdoc}, number = {6}, year = {1996}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1996_6_a0/} }
I. A. Bikchantaev. The Riemann problem with a degenerate coefficient on a Riemann surface. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 6 (1996), pp. 3-4. http://geodesic.mathdoc.fr/item/IVM_1996_6_a0/