@misc{indiciae96d07319646e,
  title = {Compression of ephemerides by discrete Chebyshev approximations},
  author = {Pickard, H. M. and Deprit, A. and Poplarchek, W.},
  year = {1978},
  url = {https://ntrs.nasa.gov/citations/19790005951},
  note = {Source identifier: 19790005951}
}