TY  - JOUR
AU  - H. Zieschang
TI  - Subgroups of a~free product of cyclic groups
JO  - Informatics and Automation
PY  - 1983
SP  - 284
EP  - 295
VL  - 154
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TRSPY_1983_154_a30/
LA  - ru
ID  - TRSPY_1983_154_a30
ER  -