TY - JOUR AU - Popivanov, Nedyu AU - Popov, Todor AU - Scherer, Rudolf TI - Singular Solutions with Exponential Growth for the (3+1)-D Wave Equation JO - Mathematics and Education in Mathematics PY - 2011 SP - 200 EP - 206 VL - 40 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MEM_2011_40_1_a18/ LA - en ID - MEM_2011_40_1_a18 ER -