@article{IVM_1957_1_a8,
     author = {V. I. Vedernikov},
     title = {Surfaces enveloping a~family of hyperspheres},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {89--97},
     publisher = {mathdoc},
     number = {1},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1957_1_a8/}
}