@article {grace1999oscillation,
	title = {Oscillation of certain functional differential equations},
	journal = {Computers and Mathematical with Applications},
	volume = {38},
	year = {1999},
	note = {n/a},
	pages = {143{\textendash}153},
	abstract = {n/a},
	author = {Grace, SR and Agarwal, RP}
}
