@inbook{16546,
  author       = {{Dellnitz, Michael and Golubitsky, Martin and Melbourne, Ian}},
  booktitle    = {{Bifurcation and Symmetry}},
  isbn         = {{9783034875387}},
  title        = {{{Mechanisms of Symmetry Creation}}},
  doi          = {{10.1007/978-3-0348-7536-3_9}},
  year         = {{1992}},
}

@inbook{16547,
  author       = {{Dellnitz, Michael and Marsden, Jerrold E. and Melbourne, Ian and Scheurle, Jürgen}},
  booktitle    = {{Bifurcation and Symmetry}},
  isbn         = {{9783034875387}},
  title        = {{{Generic Bifurcations of Pendula}}},
  doi          = {{10.1007/978-3-0348-7536-3_10}},
  year         = {{1992}},
}