%0 Journal Article %A Chryssoverghi, I. %T Approximate gradient projection method with general Runge-Kutta schemes and piecewise polynomial controls for optimal control problems %J Control and Cybernetics %D 2005 %P 425-451 %V 34 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/CC_2005_34_2_a4/ %G en %F CC_2005_34_2_a4