@article{article057d415b, title = {Shearless effective barriers to chaotic transport induced by even twin islands in nontwist systems}, author = {Mugnaine, Michele and Caldas, IberĂȘ Luiz and Szezech Junior, JosĂ© D and Viana, R L and Morrison, P J}, year = {2025}, doi = {10.1103/PhysRevE.110.044201}, publisher = {American Physical Society}, journal = {Physical Review E} }