@article{05576472, title = {On }, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {2009}, year = {2009}, doi = {10.1155/2009/989865}, zbl = {1165.42301}, language = {en}, url = {http://dml.mathdoc.fr/item/05576472} }
Nigam, H.K.; Sharma, Ajay. On . International Journal of Mathematics and Mathematical Sciences, Tome 2009 (2009) . doi : 10.1155/2009/989865. http://gdmltest.u-ga.fr/item/05576472/