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@article{PORMA_1964__23_3_114926, author = {Abian, Alexander}, title = {On the equipollence of sets}, journal = {Portugaliae mathematica}, pages = {147--156}, publisher = {mathdoc}, volume = {23}, number = {3}, year = {1964}, mrnumber = {0188085}, zbl = {0158.26801}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1964__23_3_114926/} }
Abian, Alexander. On the equipollence of sets. Portugaliae mathematica, Tome 23 (1964) no. 3, pp. 147-156. http://geodesic.mathdoc.fr/item/PORMA_1964__23_3_114926/