MathSciDoc: An Archive for Mathematician ∫

@inproceedings{ulf1952on,
  title={On empirical spectral analysis of stochastic processes},
  author={Ulf Grenander},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203413340392866},
  booktitle={Arkiv for Matematik},
  volume={1},
  number={6},
  pages={503-531},
  year={1952},
}