TY - JOUR AU - Yu. D. Strigin TI - Hierarchies of general recursive operators and general recursive types of degrees of noncomputability JO - Doklady Akademii Nauk PY - 1973 SP - 537 EP - 540 VL - 210 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1973_210_3_a7/ LA - ru ID - DAN_1973_210_3_a7 ER -