TY  - JOUR
AU  - Heiner Zieschang
AU  - Donald J. Collins
TI  - On the Nielsen Method in Free Products with Amalgamated Subgroups.
JO  - Mathematische Zeitschrift
PY  - 1988
SP  - 97
EP  - 118
VL  - 197
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1988__197_1_183720/
ID  - MZ_1988__197_1_183720
ER  -