TY  - JOUR
AU  - Ronald Brown
AU  - Christopher D. Wensley
TI  - Computing crossed modules induced by an inclusion of a normal subgroup, 
with applications to homotopy 2-types
JO  - Theory and applications of categories
PY  - 1996
SP  - 3
EP  - 16
VL  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TAC_1996_2_a0/
LA  - en
ID  - TAC_1996_2_a0
ER  -