@article {agarwal2003oscillation,
	title = {On the oscillation of certain functional differential equations via comparison methods},
	journal = {Journal of mathematical analysis and applications},
	volume = {286},
	number = {2},
	year = {2003},
	note = {n/a},
	pages = {577{\textendash}600},
	publisher = {Elsevier},
	abstract = {n/a},
	author = {Agarwal, Ravi P and Said R. Grace and O{\textquoteright}regan, Donal}
}
