MathSciDoc: An Archive for Mathematician ∫

@inproceedings{e.1929zur,
  title={Zur theorie der differentialgleichung$y'=f(x, y)$},
  author={E. Kamke},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203051612287429},
  booktitle={Acta Mathematica},
  volume={52},
  number={1},
  pages={327-339},
  year={1929},
}