%0 Journal Article %A El-Saify, Hussain A. %A Bahaa, G. M. %T Optimal control for $n\times n$ hyperbolic systems involving operators of infinite order %J Mathematica slovaca %D 2002 %P 409-424 %V 52 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_2002__52_4_a3/ %G en %F MASLO_2002__52_4_a3