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@article{IVM_1987_5_a0, author = {M. A. Akivis}, title = {On multidimensional strongly parabolic surfaces}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {3--10}, publisher = {mathdoc}, number = {5}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1987_5_a0/} }
M. A. Akivis. On multidimensional strongly parabolic surfaces. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 5 (1987), pp. 3-10. http://geodesic.mathdoc.fr/item/IVM_1987_5_a0/