@article{GDZPPN002191806,
title = {Cluster sets and essential cluster sets of meromorphic functions.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {281},
year = {1976},
pages = {35-52},
zbl = {0321.30036},
url = {http://dml.mathdoc.fr/item/GDZPPN002191806}
}
Yoshida, Hidenobu. Cluster sets and essential cluster sets of meromorphic functions.. Journal für die reine und angewandte Mathematik, Tome 281 (1976) pp. 35-52. http://gdmltest.u-ga.fr/item/GDZPPN002191806/