@misc{indiciaea6501ed68eb5,
  title = {Optical digital logic operations by two-beam coupling in photorefractive material},
  author = {Fainman, Y. and Guest, C. C. and Lee, S. H.},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19860055901},
  note = {Source identifier: 19860055901}
}