@book{19404,
	author = {Silva, J. J. R. Fraústo da and Williams, R. J. P.},
	title = {The biological chemistry of the elements :},
	publisher = {Oxford University Press,},
	year = {2001.},
	address = {Oxford ;},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0612/2001021708-t.html}
}