%0 Journal Article %A Pu Zhang %T A criterion for quasi-heredity and the characteristic module. %J Manuscripta mathematica %D 1997 %P 129-136 %V 93 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MM2_1997__93_4_156289/ %F MM2_1997__93_4_156289