MathSciDoc: An Archive for Mathematician ∫

@inproceedings{g.1923préface,
  title={Préface},
  author={G. Mittag-Leffler},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203037346686317},
  booktitle={Acta Mathematica},
  volume={39},
  number={1},
  pages={I-IV},
  year={1923},
}