%0 Journal Article
%A V. L. Selivanov
%T The structure of degrees of unsolvability of index sets
%J Algebra i logika
%D 1979
%P 463-480
%V 18
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AL_1979_18_4_a6/
%G ru
%F AL_1979_18_4_a6