@book{69818,
	author = {Jensen, A. and La Cour-Harbo, A.},
	title = {Ripples in mathematics :},
	publisher = {Springer,},
	year = {c2001 [reprinted 2005].},
	address = {Berlin ;},
	url = {http://www.loc.gov/catdir/enhancements/fy0816/2001020907-d.html}
}