@article {grace1996oscillation,
	title = {On the oscillation of certain forced functional differential equations},
	journal = {Journal of mathematical analysis and applications},
	volume = {202},
	number = {2},
	year = {1996},
	note = {n/a},
	pages = {555{\textendash}577},
	publisher = {Elsevier},
	abstract = {n/a},
	author = {Grace, SR}
}
