%0 Journal Article
%A Yu. M. Vazhenin
%T Matrix hierarchies of first-order languages and their

%J Algebra i logika
%D 1991
%P 154-167
%V 30
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AL_1991_30_2_a1/
%G ru
%F AL_1991_30_2_a1