@article{TAC_2019_34_a22,
     author = {Michael Barr and John Kennison and R. Raphael},
     title = {Coequalizers and free triples, {II}},
     journal = {Theory and applications of categories},
     pages = {662--683},
     publisher = {mathdoc},
     volume = {34},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2019_34_a22/}
}