@article{MZM_1978_24_2_a15,
     author = {B. A. Efimov},
     title = {Supercardinality of spaces associated with ultrafilters},
     journal = {Matemati\v{c}eskie zametki},
     pages = {279--288},
     publisher = {mathdoc},
     volume = {24},
     number = {2},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1978_24_2_a15/}
}