MathSciDoc: An Archive for Mathematician ∫

@inproceedings{a.1978riemannian,
  title={Riemannian geometry as determined by the volumes of small geodesic balls},
  author={A. Gray, and L. Vanhecke},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203248426219254},
  booktitle={Acta Mathematica},
  volume={142},
  number={1},
  pages={157-198},
  year={1978},
}