%0 Journal Article %A Manfrin, Renato %T Some results of Gevrey and analytic regularity for semilinear weakly hyperbolic equations of Oleinik type %J Rendiconti del Seminario Matematico della Università di Padova %D 1995 %P 165-213 %V 94 %I Seminario Matematico of the University of Padua %U http://archive.numdam.org/item/RSMUP_1995__94__165_0/ %G en %F RSMUP_1995__94__165_0