@misc{indiciae50da4552b4ce,
  title = {Hexagons and squares in a passive nonlinear optical system.},
  author = {JB Geddes and RA Indik and JV Moloney and WJ Firth},
  year = {1994},
  doi = {10.1103/physreva.50.3471},
  url = {https://pubmed.ncbi.nlm.nih.gov/9911298/},
  note = {Source identifier: 9911298}
}