@article{MAN_1976__221_162830,
     author = {Olaf von Grudzinski},
     title = {Einige elementare {Ungleichungen} f\"ur {Exponentialpolynome.}},
     journal = {Mathematische Annalen},
     pages = {9--34},
     year = {1976},
     volume = {221},
     zbl = {0308.33001},
     url = {http://geodesic.mathdoc.fr/item/MAN_1976__221_162830/}
}