@misc{indiciae9459faecbb5c,
  title = {Singular integral operators on a half-line.},
  author = {H O Cordes and E A Herman},
  year = {1966},
  doi = {10.1073/pnas.56.6.1668},
  url = {https://pubmed.ncbi.nlm.nih.gov/16591400/},
  note = {Source identifier: 16591400}
}