@article{Przybylska:2009,
  author  = "M. Przybylska",
  title   = "Darboux points and integrability of homogeneous Hamiltonian systems with three and more degrees of freedom nongeneric cases",
  journal = "Regular and Chaotic Dynamics",
  volume  = "Vol. 14",
  number  = "no 3",
  pages   = "349--388",
  year    = "2009",
}