@article{CMUC_1973__14_2_a1,
     author = {Trnkov\'a, V\v{e}ra and Koubek, V\'aclav},
     title = {The {Cantor-Bernstein} theorem for functors},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {197--204},
     publisher = {mathdoc},
     volume = {14},
     number = {2},
     year = {1973},
     mrnumber = {0330258},
     zbl = {0258.18004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1973__14_2_a1/}
}