@book{120905,
	author = {Roo, Gert de. and Visser, Jelger. and ebrary, Inc.},
	title = {Smart methods for environmental externalities},
	publisher = {Ashgate,},
	year = {2012.},
	series = {Urban planning and environment},
	address = {Farnham, Surrey ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10518251}
}