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@article{MZ_1968__103_170906, author = {Joachim Lambek}, title = {A {Fixpoint} {Theorem} for complete {Categories.}}, journal = {Mathematische Zeitschrift}, pages = {151--161}, publisher = {mathdoc}, volume = {103}, year = {1968}, zbl = {0149.26105}, url = {http://geodesic.mathdoc.fr/item/MZ_1968__103_170906/} }
Joachim Lambek. A Fixpoint Theorem for complete Categories.. Mathematische Zeitschrift, Tome 103 (1968), pp. 151-161. http://geodesic.mathdoc.fr/item/MZ_1968__103_170906/