%0 Journal Article %A I. A. Ryzhkova %T On trace regularity of solutions to a wave equation with homogeneous Neumann boundary conditions %J Žurnal matematičeskoj fiziki, analiza, geometrii %D 2007 %P 468-489 %V 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/JMAG_2007_3_a5/ %G en %F JMAG_2007_3_a5