TY  - JOUR
AU  - Brown, R.
AU  - Moore, E.J.
AU  - Porter, T.
AU  - Wensley, C.D.
TI  - Crossed complexes, and free crossed resolutions for amalgamated sums and HNN-extensions of groups.
JO  - Georgian Mathematical Journal
PY  - 2002
SP  - 623
EP  - 644
VL  - 9
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/GMJ_2002__9_4_50551/
LA  - en
ID  - GMJ_2002__9_4_50551
ER  -