%0 Journal Article
%A E. K. Haviland
%T A Note on the Extremal Surfaces in the Calculus of Variations
%J Mathematische Zeitschrift
%D 1934
%P 465-467
%V 38
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZ_1934__38_168508/
%F MZ_1934__38_168508