@misc{indiciaee41a16ad5ee9,
  title = {Collision detection for spacecraft proximity operations},
  author = {Vaughan, Robin M. and Bergmann, Edward V. and Walker, Bruce K.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910045138},
  note = {Source identifier: 19910045138}
}