@article{AM2_1981__22_136885,
     author = {A. Pinkus},
     title = {Bernstein's comparison theorem and a problem of {Braess.} {(Short} {Communication).}},
     journal = {Aequationes mathematicae},
     pages = {318--320},
     publisher = {mathdoc},
     volume = {22},
     year = {1981},
     zbl = {0533.41021},
     url = {http://geodesic.mathdoc.fr/item/AM2_1981__22_136885/}
}