%0 Journal Article %A Rocha, Paula %A Willems, Jan C. %T On the representation of 2-D systems %J Kybernetika %D 1991 %P 225-230 %V 27 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_1991__27_3_a6/ %G en %F KYB_1991__27_3_a6