MathSciDoc: An Archive for Mathematician ∫

@inproceedings{chih-han1968groups,
  title={Groups related to compact Riemann surfaces},
  author={Chih-Han Sah},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203217893254077},
  booktitle={Acta Mathematica},
  volume={123},
  number={1},
  pages={13-42},
  year={1968},
}