@article{RM_1979_34_4_a5,
     author = {A. V. Arkhangel'skii},
     title = {A~theorem on~cardinality},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {153--154},
     publisher = {mathdoc},
     volume = {34},
     number = {4},
     year = {1979},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1979_34_4_a5/}
}