%0 Journal Article
%A M.J. Pelling
%A D.G. Rogers
%T Some (2, n) combinatorial Stein groupoids. (Short Communication).
%J Aequationes mathematicae
%D 1980
%P 319-320
%V 20
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AM2_1980__20_182408/
%F AM2_1980__20_182408