@article {grace2009oscillation,
	title = {Oscillation criteria for certain third order nonlinear difference equations},
	journal = {Applicable Analysis and Discrete Mathematics},
	year = {2009},
	note = {n/a},
	pages = {27{\textendash}38},
	publisher = {JSTOR},
	abstract = {n/a},
	author = {Said R. Grace and Agarwal, Ravi P and John R. Graef}
}
