MathSciDoc: An Archive for Mathematician ∫

@inproceedings{lars1964a,
  title={A theorem of the Phragmén-Lindelöf type för second-order elliptic operators},
  author={Lars Lithner},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203431370140018},
  booktitle={Arkiv for Matematik},
  volume={5},
  number={3},
  pages={281-285},
  year={1964},
}