@misc{indiciae2a7e6519db41,
  title = {Vision-based obstacle detection for rotorcraft flight},
  author = {Sridhar, Banavar and Suorsa, Ray and Smith, Phillip and Hussien, Bassam},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19920069841},
  note = {Source identifier: 19920069841}
}