%0 Journal Article %A El-Saify, Hussain A. %A Bahaa, G. M. %T Optimal control for $n\times n$ coupled systems governed by Petrowsky type equations with control-constrained and infinite number of variables %J Mathematica slovaca %D 2003 %P 291-311 %V 53 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_2003__53_3_a5/ %G en %F MASLO_2003__53_3_a5