%0 Journal Article
%A Mucuk, Osman
%T Coverings and ring-groupoids.
%J Georgian Mathematical Journal
%D 1998
%P 475-482
%V 5
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/GMJ_1998__5_5_48189/
%G en
%F GMJ_1998__5_5_48189