@book{37447,
	author = {Mumford, Stephen. and Anjum, Rani Lill.},
	title = {Getting causes from powers},
	publisher = {Oxford University Press,},
	year = {2011.},
	address = {Oxford :},
	url = {http://dx.doi.org/10.1093/acprof:oso/9780199695614.001.0001}
}