TY  - JOUR
AU  - Hannebauer, Torsten
TI  - Relation modules of amalgamated free products and HNN extensions
JO  - Glasgow mathematical journal
PY  - 1989
SP  - 263
EP  - 270
VL  - 31
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.1017/S0017089500007849/
DO  - 10.1017/S0017089500007849
ID  - 10_1017_S0017089500007849
ER  -