@article{Maciejewski:2012,
  author  = "A. Maciejewski and M. Przybylska",
  title   = "Integrable variational equations of non-integrable systems",
  journal = "Regular and Chaotic Dynamics",
  volume  = "Vol. 17",
  number  = "no 3-4",
  pages   = "337--358",
  year    = "2012",
}