TY  - JOUR
AU  - H. Zieschang
TI  - Discrete groups of plane motions and plane group images
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1966
VL  - 21
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1966_21_3_a8/
LA  - ru
ID  - RM_1966_21_3_a8
ER  -