@misc{indiciaeff99a2309c34,
  title = {Modified-signed-digit optical computing by using fan-out elements},
  author = {Zhou, Shaomin and Campbell, Scott and Yeh, Pochi and Liu, Hua-Kuang},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19930033476},
  note = {Source identifier: 19930033476}
}