%0 Journal Article
%A V. L. Selivanov
%T The fine hierarchy and definable index sets
%J Algebra i logika
%D 1991
%P 705-725
%V 30
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AL_1991_30_6_a5/
%G ru
%F AL_1991_30_6_a5