@article{AM2_1972__8_136300,
     author = {Charles B. Dunham},
     title = {Approximation with {Respect} to {Sums} of {Chebyshev} {Norms.}},
     journal = {Aequationes mathematicae},
     pages = {267--270},
     publisher = {mathdoc},
     volume = {8},
     year = {1972},
     zbl = {0251.41009},
     url = {http://geodesic.mathdoc.fr/item/AM2_1972__8_136300/}
}