%0 Journal Article %A Allwright, John %A Vinter, Richard %T Second order conditions for periodic optimal control problems %J Control and Cybernetics %D 2005 %P 617-643 %V 34 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/CC_2005_34_3_a0/ %G en %F CC_2005_34_3_a0