%0 Journal Article
%A S. D. Denisov
%T Three theorems on elementary theories and $tt$-reducibility
%J Algebra i logika
%D 1974
%P 5-8
%V 13
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AL_1974_13_1_a0/
%G ru
%F AL_1974_13_1_a0