@misc{indiciaee21bab9c2793,
  title = {Singularities and Rayleigh's hypothesis for diffraction gratings.},
  author = {J B Keller},
  year = {2000},
  doi = {10.1364/josaa.17.000456},
  url = {https://pubmed.ncbi.nlm.nih.gov/10708025/},
  note = {Source identifier: 10708025}
}