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@article{IVM_1994_10_a11, author = {N. Kh. Khairullin}, title = {The {Goursat} problem for quasilinear systems in invariants}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {89--90}, publisher = {mathdoc}, number = {10}, year = {1994}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1994_10_a11/} }
N. Kh. Khairullin. The Goursat problem for quasilinear systems in invariants. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 10 (1994), pp. 89-90. http://geodesic.mathdoc.fr/item/IVM_1994_10_a11/