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@article{DAN_1974_218_5_a8, author = {G. V. Chudnovskii and D. V. Chudnovskii}, title = {Descendingly incomplete ultrafilters}, journal = {Doklady Akademii Nauk}, pages = {1032--1035}, publisher = {mathdoc}, volume = {218}, number = {5}, year = {1974}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1974_218_5_a8/} }
G. V. Chudnovskii; D. V. Chudnovskii. Descendingly incomplete ultrafilters. Doklady Akademii Nauk, Tome 218 (1974) no. 5, pp. 1032-1035. http://geodesic.mathdoc.fr/item/DAN_1974_218_5_a8/