%0 Journal Article
%A V. M. Sel'kin
%T On one property of the product of non-identity formations
%J Problemy fiziki, matematiki i tehniki
%D 2012
%P 101-104
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PFMT_2012_1_a18/
%G ru
%F PFMT_2012_1_a18