@article{04054006, title = {The sharpness of some cluster set results.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {10}, year = {1987}, pages = {777-786}, doi = {10.1155/S0161171287000863}, zbl = {0646.30031}, language = {en}, url = {http://dml.mathdoc.fr/item/04054006} }
Rung, D.C.; Obaid, S.A. The sharpness of some cluster set results.. International Journal of Mathematics and Mathematical Sciences, Tome 10 (1987) pp. 777-786. doi : 10.1155/S0161171287000863. http://gdmltest.u-ga.fr/item/04054006/