@article{MZ_1973__132_171934,
     author = {Dietrich Braess},
     title = {Kritische {Punkte} bei der nichtlinearen {Tschebyscheff-Approximation.}},
     journal = {Mathematische Zeitschrift},
     pages = {327--342},
     publisher = {mathdoc},
     volume = {132},
     year = {1973},
     zbl = {0251.41010},
     url = {http://geodesic.mathdoc.fr/item/MZ_1973__132_171934/}
}