@article{DAN_1963_153_4_a0,
     author = {A. Arkhangel'skii},
     title = {Some types of factor mappings, and the relations between classes of topological spaces},
     journal = {Doklady Akademii Nauk},
     pages = {743--746},
     publisher = {mathdoc},
     volume = {153},
     number = {4},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_153_4_a0/}
}