%0 Journal Article %A Dietrich Braess %T On the Number of Best Approximations in Certain Non-Linear Families of Functions. (Short Communication). %J Aequationes mathematicae %D 1974 %P 118-119 %V 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1974__11_136446/ %F AM2_1974__11_136446