%0 Journal Article %A Geerts, Ton %T A priori results in linear-quadratic optimal control theory %J Kybernetika %D 1991 %P 446-457 %V 27 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_1991__27_5_a6/ %G en %F KYB_1991__27_5_a6