@article{10_4153_CMB_1974_021_3,
     author = {Dunham, Charles B.},
     title = {Non-Convexity in {Best} {Complex} {Chebyshev} {Approximation} by {Rational} {Functions}},
     journal = {Canadian mathematical bulletin},
     pages = {115--116},
     year = {1974},
     volume = {17},
     number = {1},
     doi = {10.4153/CMB-1974-021-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-021-3/}
}