@article {219300,
	title = {Oscillation of certain fourth-order functional differential equations},
	journal = {Ukrains{\textquoteright} kyi Matematychnyi Zhurnal},
	volume = {59},
	year = {2007},
	note = {n/a},
	pages = {291{\textendash}313-291{\textendash}313},
	abstract = {n/a},
	isbn = {1027-3190},
	author = {Agarwal, P and Grace, SR and O{\textquoteright}Regan, D}
}
