%0 Journal Article %A A. Mutlu %A T. Porter %T Freeness Conditions for 2-Crossed Modules and Complexes %J Theory and applications of categories %D 1998 %P 174-194 %V 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/TAC_1998_4_a7/ %G en %F TAC_1998_4_a7