@book{178121,
	author = {Borenstein, Michael. and ebrary, Inc.},
	title = {Introduction to meta-analysis},
	publisher = {John Wiley & Sons,},
	year = {2009.},
	address = {Chichester, West Sussex, U.K. ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10297978}
}