@article{05235713, title = {Study of }, journal = {Bulletin of the Malaysian Mathematical Sciences Society. Second Series}, volume = {30}, year = {2007}, pages = {23-36}, zbl = {1133.54300}, language = {en}, url = {http://dml.mathdoc.fr/item/05235713} }
Caldas, M.; Georgiou, D.N.; Jafari, S. Study of . Bulletin of the Malaysian Mathematical Sciences Society. Second Series, Tome 30 (2007) pp. 23-36. http://gdmltest.u-ga.fr/item/05235713/