http://gradiniemappe.blogspot.com/2010/06/monete-e-antimonete.html
http://gradiniemappe.blogspot.com/2010/11/progetto-antimoneta-ad-italiacamp.html
http://gradiniemappe.blogspot.com/2011/06/antimoneta-nel-tabellone-finale.html
http://www.windbusinessfactor.it/business-idea/antimoneta/120
http://gradiniemappe.blogspot.com/2011/01/ma-ci-saranno-o-non-ci-saranno-le.html
http://forum.studenti.it/economia/766915-banconote.html
http://scatole.freehostia.com/index.html
http://mind42.com/pub/mindmap?mid=b6534e59-381c-45c9-8d12-1f404e44e7b7