@article{Maciejewski:2003,
  author  = "A. Maciejewski and M. Przybylska",
  title   = "Non-integrability of restricted two body problems in constant curvature spaces",
  journal = "Regular and Chaotic Dynamics",
  volume  = "Vol. 8",
  number  = "no 4",
  pages   = "413--430",
  year    = "2003",
}