@article {agarwal2002oscillation,
	title = {Oscillation Results for Differential Systems},
	journal = {Oscillation Theory for Second Order Linear, Half-Linear, Superlinear and Sublinear Dynamic Equations},
	year = {2002},
	note = {n/a},
	pages = {491{\textendash}557},
	publisher = {Springer Netherlands},
	abstract = {n/a},
	author = {Agarwal, Ravi P and Said R. Grace and O{\textquoteright}Regan, Donal and Agarwal, Ravi P and Said R. Grace and O{\textquoteright}Regan, Donal}
}
