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@inproceedings{hugo1885die,
  title={Die intermediäre Bahn des Mondes},
  author={Hugo Gyldén},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108202937936247818},
  booktitle={Acta Mathematica},
  volume={7},
  number={1},
  pages={125-172},
  year={1885},
}