@book{19986,
	author = {Belli, Pedro. and ebrary, Inc.},
	title = {Economic analysis of investment operations},
	publisher = {World Bank,},
	year = {c2001.},
	series = {WBI development studies},
	address = {Washington, D.C. :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=5007369}
}