%0 Journal Article
%A J.A. Crenshaw
%T Extreme Positive Linear Operators.
%J Mathematica Scandinavica
%D 1969
%P 195-217
%V 25
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MS2_1969__25_166117/
%F MS2_1969__25_166117