@article {grace2000oscillatory,
	title = {Oscillatory behaviour of certain difference equations},
	journal = {Mathematica Slovaca},
	volume = {50},
	number = {3},
	year = {2000},
	note = {n/a},
	pages = {345{\textendash}355},
	publisher = {Mathematical Institute of the Slovak Academy of Sciences},
	abstract = {n/a},
	author = {Said R. Grace}
}
