@inproceedings{e.1926les, title={Les groupes d'holonomie des espaces généralisés}, author={E. Cartan}, url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203043769782367}, booktitle={Acta Mathematica}, volume={48}, number={1}, pages={1-42}, year={1926}, }