%0 Journal Article %A A. Pinkus %T Bernstein's comparison theorem and a problem of Braess. %J Aequationes mathematicae %D 1981 %P 98-107 %V 23 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1981__23_136894/ %F AM2_1981__23_136894