@book{9756,
	author = {Wagner, Mark},
	title = {The geometries of visual space /},
	publisher = {Lawrence Erlbaum,},
	year = {2006.},
	address = {Mahwah, N.J. :},
	url = {http://www.loc.gov/catdir/enhancements/fy0643/2005051008-d.html}
}