%0 Journal Article %A Wurm, A. %A Fuchss Portela, Kathrin %T Breakup of shearless invariant tori in cubic and quartic nontwist maps %J Communications in nonlinear science & numerical simulation %V 17 %N 5 %@ 1007-5704 %C Amsterdam [u.a.] %I Elsevier %M RWTH-CONV-014118 %P 2215-2222 %D 2012 %F PUB:(DE-HGF)16 ; PUB:(DE-HGF)7 %9 Journal ArticleContribution to a book %U <Go to ISI:>//WOS:000299062100025 %R 10.1016/j.cnsns.2011.03.008 %U https://publications.rwth-aachen.de/record/133037