%0 Journal Article
%A Walter Benz
%A Claudi Alsina
%T Proportion functions in three dimensions.
%J Aequationes mathematicae
%D 1989
%P 293-305
%V 37
%N 2-3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AM2_1989__37_2-3_137308/
%F AM2_1989__37_2-3_137308