%0 Journal Article
%A Thomas J. Laffey
%T Commutative subrings of periodic rings.
%J Mathematica Scandinavica
%D 1976
%P 161-166
%V 39
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MS2_1976__39_166492/
%F MS2_1976__39_166492