TY - JOUR AU - V. D. Stepanov TI - On the vanishing of the symbol of a~convolution integral operator JO - Sbornik. Mathematics PY - 1985 SP - 239 EP - 253 VL - 51 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1985_51_1_a14/ LA - en ID - SM_1985_51_1_a14 ER -