@book{153585,
	author = {Perkins, David. and ebrary, Inc.},
	title = {Calculus and its origins},
	publisher = {Mathematical Association of America,},
	year = {2012.},
	series = {Spectrum series},
	address = {[Washington, D.C.?] :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10722452}
}