%0 Journal Article
%A L. A. Shemetkov
%T Graduated formations of groups
%J Sbornik. Mathematics
%D 1974
%P 593-611
%V 23
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1974_23_4_a6/
%G en
%F SM_1974_23_4_a6