@article{Go¼dziewski:1998,
  author  = "K. Go¼dziewski and A. Maciejewski",
  title   = "Semi-analytical model of librations of a rigid moon orbiting an oblate planet",
  journal = "Astronomy & Astrophysics",
  number  = "no 339",
  pages   = "615--622",
  year    = "1998",
}