@article {grace2010oscillation,
	title = {Oscillation criteria for certain fourth order nonlinear difference equations},
	journal = {Communications in Applied Analysis},
	volume = {14},
	number = {3},
	year = {2010},
	note = {n/a},
	pages = {337},
	abstract = {n/a},
	author = {Said R. Grace and Agarwal, Ravi P and Pinelas, Sandra}
}
