@book{5486,
	author = {Gathen, Joachim von zur. and Gerhard, Jürgen,},
	title = {Modern computer algebra /},
	publisher = {Cambridge University Press,},
	year = {1999.},
	address = {Cambridge ;},
	url = {http://www.loc.gov/catdir/description/cam0210/99232072.html}
}