@article {219290,
	title = {On the oscillatory properties of certain fourth order nonlinear difference equations},
	journal = {Journal of mathematical analysis and applications},
	volume = {322},
	year = {2006},
	note = {n/a},
	pages = {930-956},
	publisher = {Elsevier},
	abstract = {n/a},
	isbn = {0022-247X},
	author = {Agarwal, Ravi P and Said R. Grace and Manojlovic, Jelena V}
}
