%0 Journal Article
%A R. Sh. Omanadze
%T Classes of recursively enumerable sets and $Q$-reducibility
%J Matematičeskie zametki
%D 1989
%P 79-82
%V 45
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1989_45_2_a9/
%G ru
%F MZM_1989_45_2_a9