MathSciDoc: An Archive for Mathematician ∫

@inproceedings{j.1926über,
  title={Über Die Grundlagen der Kinematischen Geometrie},
  author={J. Hjelmslev},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203042496357357},
  booktitle={Acta Mathematica},
  volume={47},
  number={1},
  pages={143-188},
  year={1926},
}