http://www.antimafiaduemila.com/content/view/17282/78/

http://www.ilsole24ore.com/art/SoleOnLine4/dossier/Economia%20e%20Lavoro/2009/lezioni-per-il-futuro/26-giugno/merton-non-mi-pento.shtml?uuid=26931098-621f-11de-97da-538bdb6d4648&DocRulesView=Libero

Da elaborare.