@article{105468, author = {V\'aclav Koubek}, title = {Set functor. II: Contravariant case}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {014}, year = {1973}, pages = {47-59}, zbl = {0256.18003}, mrnumber = {0318257}, language = {en}, url = {http://dml.mathdoc.fr/item/105468} }
Koubek, Václav. Set functor. II: Contravariant case. Commentationes Mathematicae Universitatis Carolinae, Tome 014 (1973) pp. 47-59. http://gdmltest.u-ga.fr/item/105468/
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