@article{DAN_1963_151_6_a12,
     author = {V. V. Proizvolov},
     title = {Contractions on {Euclidean} spaces},
     journal = {Doklady Akademii Nauk},
     pages = {1286--1287},
     publisher = {mathdoc},
     volume = {151},
     number = {6},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_151_6_a12/}
}