@article{105354, author = {Lud\v ek Ku\v cera}, title = {A shrinking of a category of societies is a universal partly ordered class}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {012}, year = {1971}, pages = {401-411}, zbl = {0234.18005}, mrnumber = {0289393}, language = {en}, url = {http://dml.mathdoc.fr/item/105354} }
Kučera, Luděk. A shrinking of a category of societies is a universal partly ordered class. Commentationes Mathematicae Universitatis Carolinae, Tome 012 (1971) pp. 401-411. http://gdmltest.u-ga.fr/item/105354/
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