1. Colimit-dense subcategories;Adámek;Comment. Math. Univ. Carol.,2019
2. Tensor products and bimorphisms;Banaschewski;Can. Math. Bull.,1976
3. Handbook of Categorical Algebra 2: Categories and Structures;Borceux,1994
4. Codensity, Compactness and Ultrafilters;Devlin,2015
5. Operations preserving all equivalence relations;Galvin;Proc. Am. Math. Soc.,1970