@article{03734268,
title = {The radius of convexity of certain analytic functions. II.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {3},
year = {1980},
pages = {483-489},
doi = {10.1155/S0161171280000361},
zbl = {0468.30011},
language = {en},
url = {http://dml.mathdoc.fr/item/03734268}
}
Ratti, J.S. The radius of convexity of certain analytic functions. II.. International Journal of Mathematics and Mathematical Sciences, Tome 3 (1980) pp. 483-489. doi : 10.1155/S0161171280000361. http://gdmltest.u-ga.fr/item/03734268/