MathSciDoc: An Archive for Mathematician ∫

@inproceedings{lars1958on,
  title={On the regularity of the solutions of boundary problems},
  author={Lars Hörmander},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203150629961877},
  booktitle={Acta Mathematica},
  volume={99},
  number={1},
  pages={225-264},
  year={1958},
}