@article{CTGDC_2008__49_4_307_0,
     author = {Roque, A. H.},
     title = {Protomodular quasivarieties of universal algebras},
     journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques},
     pages = {307--314},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {49},
     number = {4},
     year = {2008},
     mrnumber = {2484229},
     zbl = {1166.08003},
     language = {en},
     url = {http://www.numdam.org/item/CTGDC_2008__49_4_307_0/}
}