@misc{indiciaec08c0268e6f6,
  title = {Improved Interferometric Photorefractive Optical Processor},
  author = {Cheng, Li-Jen and Liu, Tsuen-Hsi},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910000506},
  note = {Source identifier: 19910000506}
}