%0 Journal Article %A Wu, Shun-Tang %T Blow-up results for systems of nonlinear Klein-Gordon equations with arbitrary positive initial energy %J Electronic Journal of Differential Equations %D 2012 %V 2012 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2012__2012__a52/ %G en %F EJDE_2012__2012__a52