%0 Journal Article %A Yu. D. Strigin %T Hierarchies of general recursive operators and general recursive types of degrees of noncomputability %J Doklady Akademii Nauk %D 1973 %P 537-540 %V 210 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1973_210_3_a7/ %G ru %F DAN_1973_210_3_a7