@article {219163,
	title = {Oscillation theorems for certain fourth order nonlinear difference equations},
	journal = {International Journal of Difference Equations (IJDE)},
	volume = {3},
	year = {2008},
	note = {n/a},
	pages = {71-85},
	publisher = {Citeseer},
	abstract = {n/a},
	isbn = {0973-6069},
	author = {Said R. Grace and Agarwal, Ravi P and Pavani, Raffaella and Thandapani, E}
}
