MathSciDoc: An Archive for Mathematician ∫

@inproceedings{reinhold1953the,
  title={The hypercenter of a group},
  author={Reinhold Baer},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203137323804776},
  booktitle={Acta Mathematica},
  volume={89},
  number={1},
  pages={165-208},
  year={1953},
}