@article{IVM_1986_8_a9,
     author = {A. P. Norden},
     title = {A~method of specifying a~surface and a~congruence},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {52--53},
     year = {1986},
     number = {8},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1986_8_a9/}
}