@book{88179,
	author = {Ruskeepöö, Heikki.},
	title = {Mathematica navigator  mathematics, statistics, and graphics},
	publisher = {Elsevier Academic Press},
	year = {c2004},
	address = {Ámsterdam (Holanda)},
	edition = {2a. Ed.},
	url = {http://www.loc.gov/catdir/toc/els051/2003058330.html}
}