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@ARTICLE{Wurm:133037,
      author       = {Wurm, A. and Fuchss Portela, Kathrin},
      title        = {{B}reakup of shearless invariant tori in cubic and quartic
                      nontwist maps},
      journal      = {Communications in nonlinear science $\&$ numerical
                      simulation},
      volume       = {17},
      number       = {5},
      issn         = {1007-5704},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {RWTH-CONV-014118},
      pages        = {2215-2222},
      year         = {2012},
      cin          = {123010 / 120000},
      cid          = {$I:(DE-82)123010_20140620$ / $I:(DE-82)120000_20140620$},
      typ          = {PUB:(DE-HGF)16 / PUB:(DE-HGF)7},
      UT           = {WOS:000299062100025},
      doi          = {10.1016/j.cnsns.2011.03.008},
      url          = {https://publications.rwth-aachen.de/record/133037},
}