TY - JOUR AU - I. A. Kipriyanov AU - M. I. Klyuchantsev TI - The boundedness of a certain class of singular integral operators JO - Doklady Akademii Nauk PY - 1969 SP - 1253 EP - 1255 VL - 186 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1969_186_6_a4/ LA - ru ID - DAN_1969_186_6_a4 ER -