@article{RSMUP_1969__42__135_0,
     author = {Arduini, Pietro},
     title = {Monomorphisms and epimorphisms in abstract categories},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {135--166},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {42},
     year = {1969},
     mrnumber = {280559},
     zbl = {0254.18002},
     language = {en},
     url = {http://archive.numdam.org/item/RSMUP_1969__42__135_0/}
}