@article {agarwal2000oscillation,
	title = {Oscillation of higher-order difference equations},
	journal = {Applied Mathematics Letters},
	volume = {13},
	number = {1},
	year = {2000},
	note = {n/a},
	pages = {81{\textendash}88},
	publisher = {Elsevier},
	abstract = {n/a},
	author = {Agarwal, Ravi P and Said R. Grace}
}
