@article{DAN_1986_287_1_a1,
     author = {A. V. Arkhangel'skii},
     title = {$R$-factor mappings of spaces with a countable base},
     journal = {Doklady Akademii Nauk},
     pages = {14--17},
     publisher = {mathdoc},
     volume = {287},
     number = {1},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1986_287_1_a1/}
}