@inproceedings{david1968normal,
  title={Normal families and the Nevanlinna theory},
  author={David Drasin},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203216983885073},
  booktitle={Acta Mathematica},
  volume={122},
  number={1},
  pages={231-263},
  year={1968},
}