@article{DOCMA_2001__6__a6,
     author = {Winkelmann, J\"org},
     title = {Realizing countable groups as automorphism groups of {Riemann} surfaces},
     journal = {Documenta mathematica},
     pages = {413--417},
     publisher = {mathdoc},
     volume = {6},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DOCMA_2001__6__a6/}
}