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@article{IVM_1960_1_a9, author = {R. M. Geidel'man}, title = {Simplicial bending of straight-line congruences}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {84--93}, publisher = {mathdoc}, number = {1}, year = {1960}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1960_1_a9/} }
R. M. Geidel'man. Simplicial bending of straight-line congruences. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 1 (1960), pp. 84-93. http://geodesic.mathdoc.fr/item/IVM_1960_1_a9/