@book{131400,
	author = {Penrose, Roger.},
	title = {The emperor's new mind :},
	publisher = {Oxford University Press,},
	year = {1989.},
	address = {Oxford ;},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/enhancements/fy0639/89008548-d.html}
}