%0 Journal Article %A Popivanov, Nedyu %A Popov, Todor %A Scherer, Rudolf %T Singular Solutions with Exponential Growth for the (3+1)-D Wave Equation %J Mathematics and Education in Mathematics %D 2011 %P 200-206 %V 40 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MEM_2011_40_1_a18/ %G en %F MEM_2011_40_1_a18