@misc{indiciaed7f360a468bc,
  title = {A problem of collision avoidance},
  author = {Vincent, T. L. and Cliff, E. M. and Grantham, W. J. and Peng, W. Y.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19730005974},
  note = {Source identifier: 19730005974}
}