%0 Journal Article %A Charles B. Dunham %T Approximation with Respect to Sums of Chebyshev Norms. %J Aequationes mathematicae %D 1972 %P 267-270 %V 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1972__8_136300/ %F AM2_1972__8_136300