@article{01680953,
title = {Realizing countable groups as automorphism groups of Riemann surfaces.},
journal = {Documenta Mathematica},
volume = {6},
year = {2001},
pages = {413-417},
zbl = {0989.30030},
language = {en},
url = {http://dml.mathdoc.fr/item/01680953}
}
Winkelmann, Jörg. Realizing countable groups as automorphism groups of Riemann surfaces.. Documenta Mathematica, Tome 6 (2001) pp. 413-417. http://gdmltest.u-ga.fr/item/01680953/