@InCollection{Szumiński:2014,
  author  = "W. Szumiński and M. Przybylska",
  title     = "Constrained n-body problems",
  pages     = "305--317",
  year      = "2014",
  booktitle = "Applied non-linear dynamical systems, ISBN: 9783319082653",
  editor    = "ed. J. Awrejcewicz",
  publisher = "Springer International Publishing Switzerland",
  address   = "Cham Heidelberg",
  series    = "Springer Proceedings in Mathematics & Statistics : Vol. 93",
}