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@article{MAN_1970__189_162088, author = {A. ABIAN}, title = {Some {Special} {Properties} of {Cofinality} of {Ordinal} {Numbers.}}, journal = {Mathematische Annalen}, pages = {325--329}, publisher = {mathdoc}, volume = {189}, year = {1970}, zbl = {0193.30802}, url = {http://geodesic.mathdoc.fr/item/MAN_1970__189_162088/} }
A. ABIAN. Some Special Properties of Cofinality of Ordinal Numbers.. Mathematische Annalen, Tome 189 (1970), pp. 325-329. http://geodesic.mathdoc.fr/item/MAN_1970__189_162088/