%0 Journal Article %A Dominique Bourn %A Marino Gran %T Centrality and normality in protomodular categories %J Theory and applications of categories %D 2001 %P 151-165 %V 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/TAC_2001_9_a7/ %G en %F TAC_2001_9_a7