@book{28123,
	author = {Kreyszig, Erwin},
	title = {Advanced engineering mathematics /},
	publisher = {Wiley,},
	year = {c1999},
	address = {New York :},
	edition = {8th ed.},
	url = {http://www.loc.gov/catdir/toc/onix04/98037591.html}
}