%0 Journal Article
%A C.E. Carroll
%T Proof of Oppenheim's area inequalities for triangles and quadrilaterals.
%J Aequationes mathematicae
%D 1982
%P 97-109
%V 24
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AM2_1982__24_136929/
%F AM2_1982__24_136929