MathSciDoc: An Archive for Mathematician ∫

@inproceedings{ludwig1926hilberts,
  title={Hilberts satz Über Flächen Konstanter Negativer Krümmung},
  author={Ludwig Bieberbach},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203044818589377},
  booktitle={Acta Mathematica},
  volume={48},
  number={3},
  pages={319-327},
  year={1926},
}