@misc{indiciaec1eed0a7babd,
  title = {Vision-based optimal obstacle-avoidance guidance for rotorcraft},
  author = {Menon, P. K. A. and Chatterji, G. B. and Sridhar, B.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910065089},
  note = {Source identifier: 19910065089}
}