%0 Journal Article %A Felgenhauer, Ursula %T Optimality properties of controls with bang-bang components in problems with semilinear state equation %J Control and Cybernetics %D 2005 %P 763-785 %V 34 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/CC_2005_34_3_a7/ %G en %F CC_2005_34_3_a7