TY - JOUR AU - E. O. Sivkova TI - Optimal recovery of fractional powers of the Laplace difference operator JO - Sbornik. Mathematics PY - 2025 SP - 445 EP - 455 VL - 216 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_2025_216_3_a11/ LA - en ID - SM_2025_216_3_a11 ER -