@misc{indiciae2bb71250e7df,
  title = {Focal shift, optical transfer function, and phase-space representations.},
  author = {C J Sheppard and K G Larkin},
  year = {2000},
  doi = {10.1364/josaa.17.000772},
  url = {https://pubmed.ncbi.nlm.nih.gov/10757186/},
  note = {Source identifier: 10757186}
}