@misc{indiciaef487ed4d10b0,
  title = {Modifications to Encke's method for long arc orbit determination solutions},
  author = {Lundberg, J. B. and Bettadpur, S. and Eanes, R. J.},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19920060629},
  note = {Source identifier: 19920060629}
}