MathSciDoc: An Archive for Mathematician ∫

@inproceedings{h.1903on,
  title={On a system of differential equations leading to periodic functions},
  author={H. F. Baker},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203012628713121},
  booktitle={Acta Mathematica},
  volume={27},
  number={1},
  pages={135-156},
  year={1903},
}