TY - JOUR T1 - Homogeneous tangent vectors and high order necessary conditions for optimal controls JF - J. Dynam. Control Systems 3 (1997), no. 2, 205--240 Y1 - 1997 A1 - Fabio Ancona PB - SISSA Library UR - http://hdl.handle.net/1963/1015 U1 - 2841 U2 - Mathematics U3 - Functional Analysis and Applications ER -