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www.springerlink.com/content/0163-5158/37/1/
International Psychogeriatrics (Vol. 24, No. 4, April 2012).
journals.cambridge.org/action/displayIssue?decade=2010&jid=IPG&volumeId=24&issueId=04&iid=8499489
Journal of Pension Economics and Finance (Vol. 11, No. 2, April 2012).
journals.cambridge.org/action/displayIssue?decade=2010&jid=PEF&volumeId=11&issueId=02&iid=8499796
