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@inproceedings{edvard1885über,
  title={Über die Begrenzungen von Continua},
  author={Edvard Phragmén},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108202937413037813},
  booktitle={Acta Mathematica},
  volume={7},
  number={1},
  pages={43-48},
  year={1885},
}