TY - JOUR T1 - Abnormal extremals for minimum time on the plane Y1 - 2000 A1 - Ugo Boscain A1 - Benedetto Piccoli PB - SISSA Library UR - http://hdl.handle.net/1963/1508 U1 - 2655 U2 - Mathematics U3 - Functional Analysis and Applications ER -