TY  - JOUR
AU  - J. M. Casas
AU  - A. M. Vieites
TI  - Some results on central extensions of crossed modules
JO  - Homology, homotopy, and applications
PY  - 2002
SP  - 29
EP  - 42
VL  - 4
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4310/HHA.2002.v4.n1.a3/
DO  - 10.4310/HHA.2002.v4.n1.a3
LA  - en
ID  - HHA_2002_4_1_a2
ER  -