%0 Journal Article
%A Luigi Azzena
%A Francesco Piras
%T The Duality between Incidence Algebras and Coalgebras. A Few Remarks
%J Séminaire lotharingien de combinatoire
%D 1987
%V 16
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SLC_1987_16_a6/
%F SLC_1987_16_a6