@misc{indiciaed186a02bf90b,
  title = {Proper-time relativistic dynamics},
  author = {Gill, Tepper L. and Zachary, W. W. and Lindesay, James},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19930018145},
  note = {Source identifier: 19930018145}
}