@article{TAC_2021_36_a2,
     author = {Dominique Bourn and Giuseppe Metere},
     title = {A note on the categorical notions of normal subobject and of equivalence class},
     journal = {Theory and applications of categories},
     pages = {65--101},
     year = {2021},
     volume = {36},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2021_36_a2/}
}