%0 Journal Article
%A V. Yu. Popov
%T On positive theories of semigroup varieties and pseudovarieties
%J Fundamentalʹnaâ i prikladnaâ matematika
%D 2002
%P 631-635
%V 8
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FPM_2002_8_2_a17/
%G ru
%F FPM_2002_8_2_a17