@article{05849545, title = {A }, journal = {Bulletin of the Malaysian Mathematical Sciences Society. Second Series}, volume = {34}, year = {2011}, pages = {189-200}, zbl = {1213.46039}, language = {en}, url = {http://dml.mathdoc.fr/item/05849545} }
Chaisuriya, Pachara. A . Bulletin of the Malaysian Mathematical Sciences Society. Second Series, Tome 34 (2011) pp. 189-200. http://gdmltest.u-ga.fr/item/05849545/