@article {596,
	title = {Onset of shearless magnetic surfaces in tokamaks},
	journal = {Nuclear Fusion},
	volume = {54},
	year = {2014},
	month = {Jan-06-2014},
	pages = {064010},
	issn = {0029-5515},
	doi = {10.1088/0029-5515/54/6/064010},
	author = {C. V. Abud and I. L. Caldas}
}
