TY  - JOUR
AU  - Jörg Winkelmann
TI  - Realizing countable groups as automorphism groups of Riemann surfaces
JO  - Documenta mathematica
PY  - 2001
SP  - 413
EP  - 417
VL  - 6
UR  - http://geodesic.mathdoc.fr/articles/10.4171/dm/108/
DO  - 10.4171/dm/108
ID  - 10_4171_dm_108
ER  -