@article{TAC_2003_11_a5,
     author = {Dominique Bourn and George Janelidze},
     title = {Characterization of protomodular varieties of universal algebras},
     journal = {Theory and applications of categories},
     pages = {143--147},
     publisher = {mathdoc},
     volume = {11},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2003_11_a5/}
}