@article{05574406, title = {A new 4-point }, journal = {Abstract and Applied Analysis}, volume = {2009}, year = {2009}, doi = {10.1155/2009/301967}, zbl = {1167.65342}, language = {en}, url = {http://dml.mathdoc.fr/item/05574406} }
Mustafa, Ghulam; Khan, Faheem. A new 4-point . Abstract and Applied Analysis, Tome 2009 (2009) . doi : 10.1155/2009/301967. http://gdmltest.u-ga.fr/item/05574406/