@book{121694,
	author = {English, Lyn D. (ed.)},
	title = {Mathematical reasoning :},
	publisher = {L. Erlbaum Associates,},
	year = {1997.},
	address = {Mahwah, N.J. :},
	url = {http://www.loc.gov/catdir/enhancements/fy0709/96048234-d.html}
}