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@article{MAN_1975__216_162720, author = {Erik Ellentuck}, title = {G\"odel's {Square} {Axioms} for the {Continuum.}}, journal = {Mathematische Annalen}, pages = {29--34}, publisher = {mathdoc}, volume = {216}, year = {1975}, zbl = {0289.02051}, url = {http://geodesic.mathdoc.fr/item/MAN_1975__216_162720/} }
Erik Ellentuck. Gödel's Square Axioms for the Continuum.. Mathematische Annalen, Tome 216 (1975), pp. 29-34. http://geodesic.mathdoc.fr/item/MAN_1975__216_162720/