MathSciDoc: An Archive for Mathematician ∫

@inproceedings{lars1968the,
  title={The spectral function of an elliptic operator},
  author={Lars Hörmander},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203215716372063},
  booktitle={Acta Mathematica},
  volume={121},
  number={1},
  pages={193-218},
  year={1968},
}