@InCollection{Maciejewski:1999,
  author    = "A. Maciejewski",
  title     = "The two rigid bodies problem. Reduction and relative equilibra",
  pages     = "475--479",
  year      = "1999",
  booktitle = "Hamiltonian systems with three of more degrees of Freedom, ISBN: 0792357108",
  publisher = "Kluwer Academic Publisher",
  address   = "Dordrecht",
}