%0 Journal Article %A Kutev, N. %A Kolkovska, N. %A Dimova, M. %T Finite Time Blow up of the Solutions to Nonlinear Klein-Gordon Equation with Arbitrary High Positive Initial Energy %J Serdica Mathematical Journal %D 2015 %P 481-492 %V 41 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/SMJ2_2015_41_4_a9/ %G en %F SMJ2_2015_41_4_a9