@book{181934,
	author = {Andersen, Hanne, and Barker, Peter, and ebrary, Inc.},
	title = {The cognitive structure of scientific revolutions},
	publisher = {Cambridge University Press,},
	year = {2006.},
	address = {Cambridge ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10130367}
}