TY - JOUR AU - V. V. Škira TI - Universal functions for certain classes of recursive functions and sets JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1973 SP - 243 EP - 250 VL - 133 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_1973_133_a21/ LA - ru ID - TM_1973_133_a21 ER -