%0 Journal Article %A E. Casas %A Mariano Mateos %A Fredi Tröltzsch %T Necessary and Sufficient Optimality Conditions for Optimization Problems in Function Spaces and Applications to Control Theory %J ESAIM. Proceedings %D 2003 %P 18-30 %V 13 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1051/proc:2003001/ %R 10.1051/proc:2003001 %G en %F EP_2003_13_a2