@article{MAN_1971__195_162214,
     author = {G\"unter Frank and Erwin Mues},
     title = {\"Uber das {Wachstum} des {Index} ganzer {Funktionen.}},
     journal = {Mathematische Annalen},
     pages = {114--120},
     publisher = {mathdoc},
     volume = {195},
     year = {1971},
     zbl = {0215.13101},
     url = {http://geodesic.mathdoc.fr/item/MAN_1971__195_162214/}
}