@article{DAN_1957_114_3_a11,
     author = {S. S. Ryshkov},
     title = {On the combinatorial topology of {Hilbert} space},
     journal = {Doklady Akademii Nauk},
     pages = {494--497},
     year = {1957},
     volume = {114},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1957_114_3_a11/}
}