@article{TAC_2015_30_a6,
     author = {Alan S. Cigoli and Andrea Montoli},
     title = {Characteristic subobjects in semi-abelian categories},
     journal = {Theory and applications of categories},
     pages = {206--228},
     publisher = {mathdoc},
     volume = {30},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2015_30_a6/}
}