%0 Journal Article
%A A. M. Nurakunov
%T Quasivarieties of algebras with definable principal
%J Algebra i logika
%D 1990
%P 35-46
%V 29
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AL_1990_29_1_a3/
%G ru
%F AL_1990_29_1_a3