@article{01656484, title = {On }, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {25}, year = {2001}, pages = {193-197}, doi = {10.1155/S0161171201005804}, zbl = {0988.19002}, language = {en}, url = {http://dml.mathdoc.fr/item/01656484} }
Elhamdadi, Mohamed. On . International Journal of Mathematics and Mathematical Sciences, Tome 25 (2001) pp. 193-197. doi : 10.1155/S0161171201005804. http://gdmltest.u-ga.fr/item/01656484/