@misc{indiciae94e0fa0044be,
  title = {Application of Encke's method to long arc orbit determination solutions},
  author = {Lundberg, J. B. and Schutz, B. E. and Fields, R. K. and Watkins, M. M.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910054806},
  note = {Source identifier: 19910054806}
}