%0 Journal Article %A Doktor, Alexander %T Mixed problem for semilinear hyperbolic equation of second order with the Dirichlet boundary condition (Preliminary communication) %J Commentationes Mathematicae Universitatis Carolinae %D 1972 %P 185-189 %V 13 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1972__13_1_a15/ %G en %F CMUC_1972__13_1_a15