MathSciDoc: An Archive for Mathematician ∫

@inproceedings{olli1958a,
  title={A generalization of picard’s theorem},
  author={Olli Lehto},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203423047530946},
  booktitle={Arkiv for Matematik},
  volume={3},
  number={6},
  pages={495-500},
  year={1958},
}