%0 Journal Article %A Bisiacco, Mauro %A Fornasini, Ettore %T Structure and solutions of the LQ optimal control problem for 2D systems %J Kybernetika %D 1991 %P 231-242 %V 27 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_1991__27_3_a7/ %G en %F KYB_1991__27_3_a7