%0 Journal Article %A Pulkina, L.S. %T A non-local problem with integral conditions for hyperbolic equations %J Electronic Journal of Differential Equations %D 1999 %V 1999 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_1999__1999__a41/ %G en %F EJDE_1999__1999__a41