MathSciDoc: An Archive for Mathematician ∫

@inproceedings{w.1938linear,
  title={Linear difference equations with arbitrary real spans},
  author={W. T. Martin},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203111918343588},
  booktitle={Acta Mathematica},
  volume={69},
  number={1},
  pages={57-98},
  year={1938},
}