Links:
[1] http://www.cepi.org/order_publication
[2] http://www.cepi.org/print/846
[3] http://digibook.digi-work.com/Digibooks.aspx/Display?Key=dW5hbWU9Y2VwaSZpZD01ODImZmlsZT1hSFIwY0RvdkwzZDNkeTVqWlhCcExtOXlaeTl6ZVhOMFpXMHZabWxzWlhNdmNIVmliR2xqTDJSdlkzVnRaVzUwY3k5d2RXSnNhV05oZEdsdmJuTXZjbVZqZVdOc2FXNW5Mekl3TURZdk1qQXdObEpsYzNCZlUyOTFjbU5wYm1kZlIzVnBaR1ZzYVc1bGN5MHlNREV5TURZeE1pMHdNREF3TkMwd01TMUZMbkJrWmc9PSZsYW5nPWVuJm1kNT1lNjM3OGZjYjRkMWVmMzkyZmZkNTVlNDNlMTgzN2Y5YQ==
[4] http://www.cepi.org/system/files/public/documents/publications/recycling/2006/2006Resp_Sourcing_Guidelines-20120612-00004-01-E.pdf