@misc{indiciae535863a4a77f,
  title = {Integration of active and passive sensors for obstacle avoidance},
  author = {Cheng, Victor H. L. and Sridhar, Banavar},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19890066712},
  note = {Source identifier: 19890066712}
}