@misc{indiciae4eaa34776d09,
  title = {Phobos' gravity field and its influence on its orbit and physical librations},
  author = {Borderies, N. and Yoder, C. F.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19900065397},
  note = {Source identifier: 19900065397}
}