%0 Journal Article %A Hernández, Vicente G. %T Algebraic matrix equations in systems theory %J Portugaliae mathematica %D 1985 %P 17-33 %V 43 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1985__43_1_114535/ %G en %F PORMA_1985__43_1_114535