%0 Journal Article
%A M.J. Pelling
%A D.G. Rogers
%T Some (2, n) combinatorial Stein groupoids.
%J Aequationes mathematicae
%D 1980
%P 225-235
%V 21
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AM2_1980__21_182432/
%F AM2_1980__21_182432