%0 Journal Article
%A Helmut Brass
%T Converse theorems for the trapezoidal rule. (Short Communication).
%J Aequationes mathematicae
%D 1978
%P 384-385
%V 17
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AM2_1978__17_136758/
%F AM2_1978__17_136758