%0 Journal Article %A Bressan, Aldo %T On control theory and its applications to certain problems for Lagrangian systems. On hyper-impulsive motions for these. III. Strengthening of the characterizations performed in parts I and II, for Lagrangian systems. An invariance property. %J Atti della Accademia nazionale dei Lincei. Rendiconti della Classe di scienze fisiche, matematiche e naturali %D 1988 %P 461-471 %V 82 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/RLINA_1988_8_82_3_a8/ %G en %F RLINA_1988_8_82_3_a8