@article {725,
	title = {Ratchet current in nontwist Hamiltonian systems},
	journal = {Chaos: An Interdisciplinary Journal of Nonlinear Science},
	volume = {30},
	year = {2020},
	month = {sep},
	pages = {093141},
	doi = {10.1063/5.0022073},
	author = {Michele Mugnaine and Antonio M. Batista and Iber{\^e} L. Caldas and Jos{\'e} D. Szezech and Ricardo L. Viana}
}
