@misc{95746,
  author = {Herbert Lau and Tsai and Martin Herman},
  title = {Optimal Estimation of Optical Flow, Time-to-contact and Depth},
  year = {1992},
  month = {1992-09-01},
  publisher = {NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=820427},
  language = {en},
}