@book{215398,
	author = {Zill, Dennis G., and Cullen, Michael R.},
	title = {Differential equations with boundary-value problems (EBOOK)},
	publisher = {Brooks/Cole, Cengage Learning,},
	year = {c2009.},
	address = {Belmont, CA :},
	edition = {5th ed. /},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/enhancements/fy1302/2008924835-b.html}
}