MathSciDoc: An Archive for Mathematician ∫

@inproceedings{olli1957boundary,
  title={Boundary behaviour and normal meromorphic functions},
  author={Olli Lehto, and K. I. Virtanen},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203146392879843},
  booktitle={Acta Mathematica},
  volume={97},
  number={1},
  pages={47-65},
  year={1957},
}