MathSciDoc: An Archive for Mathematician ∫

@inproceedings{fr.1936sur,
  title={Sur les variétés à torsion nulle},
  author={FR. Fabricius-Bjerre},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203107770853552},
  booktitle={Acta Mathematica},
  volume={66},
  number={1},
  pages={49-77},
  year={1936},
}