@article{MOMA_1973__77_177650,
     author = {K. Doppel},
     title = {Eine {Absch\"atzung} f\"ur schlichte {Funktionen.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {299--301},
     publisher = {mathdoc},
     volume = {77},
     year = {1973},
     zbl = {0272.30015},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1973__77_177650/}
}