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@article{IVM_1994_3_a8, author = {\`E. G. Poznyak and A. G. Popov}, title = {Lobachevskij geometry and physics}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {44--49}, publisher = {mathdoc}, number = {3}, year = {1994}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1994_3_a8/} }
È. G. Poznyak; A. G. Popov. Lobachevskij geometry and physics. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 3 (1994), pp. 44-49. http://geodesic.mathdoc.fr/item/IVM_1994_3_a8/