TY - JOUR AU - V. Ya. Ivrii TI - The nonclassical propagation of singularities of a solution of the wave equation near a boundary JO - Doklady Akademii Nauk PY - 1978 SP - 1013 EP - 1015 VL - 241 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1978_241_5_a3/ LA - ru ID - DAN_1978_241_5_a3 ER -