%0 Journal Article %A Sharma, Jaita Pankaj %A George, Raju K. %T Controllability of matrix second order systems: a trigonometric matrix approach %J Electronic Journal of Differential Equations %D 2007 %V 2007 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2007__2007__a22/ %G en %F EJDE_2007__2007__a22