@book{4369,
	author = {Gelbaum, Bernard R. and Olmsted, John Meigs Hubbell,},
	title = {Theorems and counterexamples in mathematics /},
	publisher = {Springer-Verlag,},
	year = {c1990.},
	address = {New York :},
	url = {http://www.loc.gov/catdir/enhancements/fy0815/90009899-d.html}
}