@article{Go¼dziewski:1998,
  author  = "K. Go¼dziewski and A. Maciejewski",
  title   = "Nonlinear stability of the Lagrangian libration points in the Chermnykh problem",
  journal = "Celestial Mechanics and Dynamical Astronomy",
  number  = "no 70",
  pages   = "41--58",
  year    = "1998",
}