@article{DAN_1966_166_1_a8,
     author = {V. V. Proizvolov},
     title = {On finite-to-one open mappings},
     journal = {Doklady Akademii Nauk},
     pages = {38--40},
     publisher = {mathdoc},
     volume = {166},
     number = {1},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_166_1_a8/}
}