%0 Journal Article %A Zerrik, E. %A Boutoulout, A. %A Kamal, A. %T Regional Gradient Controllability of Parabolic Systems %J International Journal of Applied Mathematics and Computer Science %D 1999 %P 767-787 %V 9 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/IJAMCS_1999_9_4_a1/ %G en %F IJAMCS_1999_9_4_a1