TY  - JOUR
AU  - Robert Bieri
AU  - Benno Eckmann
TI  - Amalgamated Free Products of Groups and Homological Duality
JO  - Commentarii mathematici Helvetici
PY  - 1974
SP  - 460
EP  - 478
VL  - 49
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1974__49_139594/
ID  - CMH_1974__49_139594
ER  -