TY - JOUR AU - P. P. Kargaev TI - Nonlocal almost differential operators and interpolation by functions with sparse spectrum JO - Sbornik. Mathematics PY - 1987 SP - 131 EP - 140 VL - 56 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1987_56_1_a8/ LA - en ID - SM_1987_56_1_a8 ER -