@inproceedings{olli1954on,
title={On the distribution of values of meromorphic functions of bounded characteristic},
author={Olli Lehto},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203139164584791},
booktitle={Acta Mathematica},
volume={91},
number={1},
pages={87-112},
year={1954},
}
Olli Lehto. On the distribution of values of meromorphic functions of bounded characteristic. 1954. Vol. 91. In Acta Mathematica. pp.87-112. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203139164584791.