@article {27444,
	title = {Tunable fermi acceleration in the driven elliptical billiard},
	journal = {PHYSICAL REVIEW LETTERS},
	volume = {100},
	year = {2008},
	month = {2008},
	isbn = {0031-9007},
	author = {Lenz, F. and Diakonos, F. K. and Schmelcher, P.}
}
