@article{AM2_1973__9_136324,
     author = {CHARLES B. DUNHAM},
     title = {The {Limit} of {Non-Linear} {Chebyshev} {Approximation} on {Subsets}},
     journal = {Aequationes mathematicae},
     pages = {60--63},
     publisher = {mathdoc},
     volume = {9},
     year = {1973},
     zbl = {0256.41024},
     url = {http://geodesic.mathdoc.fr/item/AM2_1973__9_136324/}
}