@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/}
}