MathSciDoc: An Archive for Mathematician ∫

@inproceedings{a.1952on,
  title={On the existence of certain singular integrals},
  author={A. P. Calderon, and A. Zygmund},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203135725155763},
  booktitle={Acta Mathematica},
  volume={88},
  number={1},
  pages={85-139},
  year={1952},
}