@article{IVM_1959_3_a3,
     author = {R. M. Geidel'man},
     title = {On the theory of families of planes in {non-Euclidean} spaces},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {30--42},
     publisher = {mathdoc},
     number = {3},
     year = {1959},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1959_3_a3/}
}