@misc{indiciaea338c2b5b5ce,
  title = {Nutation of Mars},
  author = {Lyttleton, R. A. and Cain, D. L. and Liu, A. S.},
  year = {1979},
  url = {https://ntrs.nasa.gov/citations/19790024969},
  note = {Source identifier: 19790024969}
}