@article{GDZPPN002426714,
title = {On the Spherical Derivative of a Meromorphic Function with a Valiron Deficient Value.},
journal = {Mathematische Zeitschrift},
volume = {180},
year = {1982},
pages = {545-552},
zbl = {0498.30035},
url = {http://dml.mathdoc.fr/item/GDZPPN002426714}
}
Winkler, Jörg; Toppila, Sakari. On the Spherical Derivative of a Meromorphic Function with a Valiron Deficient Value.. Mathematische Zeitschrift, Tome 180 (1982) pp. 545-552. http://gdmltest.u-ga.fr/item/GDZPPN002426714/