MathSciDoc: An Archive for Mathematician ∫

@inproceedings{per1970convergence,
  title={Convergence almost everywhere of certain singular integrals and multiple Fourier series},
  author={Per Sjölin},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203446495797146},
  booktitle={Arkiv for Matematik},
  volume={9},
  number={1},
  pages={65-90},
  year={1970},
}