@article{JDM_1971__73_146595,
     author = {Rolf Joachim Nessel},
     title = {\"Uber {Nikolskii-Konstanten} von positiven {Approximationsverfahren} bez\"uglich {Lipschitz-Klassen.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {6--47},
     publisher = {mathdoc},
     volume = {73},
     year = {1971},
     zbl = {0216.14201},
     url = {http://geodesic.mathdoc.fr/item/JDM_1971__73_146595/}
}