@article{GDZPPN00240964X,
title = {The Radius of Starlikeness of Certain Analytic Functions.},
journal = {Mathematische Zeitschrift},
volume = {121},
year = {1971},
pages = {351-354},
url = {http://dml.mathdoc.fr/item/GDZPPN00240964X}
}
Ziegler, Michael R. The Radius of Starlikeness of Certain Analytic Functions.. Mathematische Zeitschrift, Tome 121 (1971) pp. 351-354. http://gdmltest.u-ga.fr/item/GDZPPN00240964X/