TY  - JOUR
AU  - Heiner Zieschang
TI  - Generators of Free Product with Amalgamation of two Infinite Cyclic Groups.
JO  - Mathematische Annalen
PY  - 1977
SP  - 195
EP  - 222
VL  - 227
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MAN_1977__227_162976/
ID  - MAN_1977__227_162976
ER  -