@article{CMUC_1973__14_3_a3,
     author = {Koubek, V\'aclav and Reiterman, Jan},
     title = {Set functors. {III:} {Monomorphisms,} epimorphisms, isomorphisms},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {441--455},
     publisher = {mathdoc},
     volume = {14},
     number = {3},
     year = {1973},
     mrnumber = {0340362},
     zbl = {0267.18008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1973__14_3_a3/}
}