%0 Journal Article
%A W.T. Tutte
%T Mediations on the product rule.
%J Aequationes mathematicae
%D 1985
%P 13-21
%V 28
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AM2_1985__28_137035/
%F AM2_1985__28_137035