@misc{indiciae4048321f3fb8,
  title = {New method for estimating low-earth-orbit collision probabilities},
  author = {Vedder, John D. and Tabor, Jill L.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910058015},
  note = {Source identifier: 19910058015}
}