MathSciDoc: An Archive for Mathematician ∫

@inproceedings{dennis1971linear,
  title={Linear extremal problems for analytic functions},
  author={Dennis A. Hejhal},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203224437188127},
  booktitle={Acta Mathematica},
  volume={128},
  number={1},
  pages={91-122},
  year={1971},
}