%0 Journal Article
%A A.B. Engel
%A L. Makar-Limanov
%T On groups rings which are not Ore domains.
%J Semigroup forum
%D 1989
%P 249-254
%V 39
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1989__39_2_134989/
%F SF_1989__39_2_134989