@misc{indiciaefa524e58cd87,
  title = {Step-transition perturbation approach for pixel-structured nonparaxial diffractive elements.},
  author = {Tuomas Vallius and Markku Kuittinen and Jari Turunen and Ville Kettunen},
  year = {2002},
  doi = {10.1364/josaa.19.001129},
  url = {https://pubmed.ncbi.nlm.nih.gov/12049350/},
  note = {Source identifier: 12049350}
}