@book {219122,
	title = {Oscillation theory for second order dynamic equations},
	year = {2002},
	note = {n/a},
	publisher = {CRC Press},
	organization = {CRC Press},
	abstract = {n/a},
	isbn = {020322289X},
	author = {Agarwal, Ravi P and Said R. Grace and O{\textquoteright}regan, Donal}
}
