%0 Journal Article
%A Ronald Brown
%A Christopher D. Wensley
%T Computing crossed modules induced by an inclusion of a normal subgroup, 
with applications to homotopy 2-types
%J Theory and applications of categories
%D 1996
%P 3-16
%V 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TAC_1996_2_a0/
%G en
%F TAC_1996_2_a0