@misc{indiciae55b2d519ecd8,
  title = {A station-keeping method for libration point trajectories},
  author = {Howell, K. C. and Pernicka, H. J.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19900065978},
  note = {Source identifier: 19900065978}
}