@misc{indiciae7efbb9906459,
  title = {Localization problem in optics: Nonlinear quasiperiodic media.},
  author = {SD Gupta and DS Ray},
  year = {1990},
  doi = {10.1103/physrevb.41.8047},
  url = {https://pubmed.ncbi.nlm.nih.gov/9993123/},
  note = {Source identifier: 9993123}
}