TY  - JOUR
AU  - D. Bourn
AU  - E. M. Vitale
TI  - Extensions of symmetric cat-groups
JO  - Homology, homotopy, and applications
PY  - 2002
SP  - 103
EP  - 162
VL  - 4
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4310/HHA.2002.v4.n1.a8/
DO  - 10.4310/HHA.2002.v4.n1.a8
LA  - en
ID  - HHA_2002_4_1_a7
ER  -