@article {Cherkas:2003:1382-3892:215,
	author = "Cherkas B.",
	title = "Finding Polynomial and Rational Function Turning Points in Precalculus",
	journal = "International Journal of Computers for Mathematical Learning",
	volume = "8",
	year = "2003",
	abstract = "",
	pages = "215-234(20)",
	url = "http://www.ingentaconnect.com/content/klu/ijco/2003/00000008/00000002/05151015"
}