@article {2000,
	title = {Abnormal extremals for minimum time on the plane},
	number = {SISSA;50/00/M},
	year = {2000},
	publisher = {SISSA Library},
	url = {http://hdl.handle.net/1963/1508},
	author = {Ugo Boscain and Benedetto Piccoli}
}
