%0 Journal Article %A A. Pinkus %T Bernstein's comparison theorem and a problem of Braess. (Short Communication). %J Aequationes mathematicae %D 1981 %P 318-320 %V 22 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1981__22_136885/ %F AM2_1981__22_136885