@article{MZ_1969__109_171125,
     author = {George G. Lorentz and Karl L. Zeller},
     title = {Gleichm\"a{\ss}ige {Approximation} durch monotone {Polynome.}},
     journal = {Mathematische Zeitschrift},
     pages = {87--91},
     publisher = {mathdoc},
     volume = {109},
     year = {1969},
     zbl = {0175.06201},
     url = {http://geodesic.mathdoc.fr/item/MZ_1969__109_171125/}
}