@article{789731,
  author = {Peter Ott and Mohammed Al Shakhs and Henri Lezec and Kenneth Chau},
  title = {Flat lens criterion by small-angle phase},
  year = {2014},
  number = {22},
  month = {2014-12-01 00:12:00},
  publisher = {Optics Express},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=915969},
  doi = {https://doi.org/10.1364/OE.22.029340},
  language = {en},
}