MathSciDoc: An Archive for Mathematician ∫

@inproceedings{f.1939special,
  title={Special solutions of certain difference equations},
  author={F. John},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203114689374607},
  booktitle={Acta Mathematica},
  volume={71},
  number={1},
  pages={175-189},
  year={1939},
}