I. DOCUMENTE EUROPENE
http://ec.europa.eu/enterprise/policies/sustainable-business/index_en.htm
http://europa.eu/legislation_summaries/external_trade/c00019_en.htm
II. ALTE DOCUMENTE INSTITUŢIONALE
http://www.wbcsdcement.org/pdf/tf1/cement_reporting_protocol.pdf
http://www.wbcsdcement.org/pdf/tf1/15greenhouse1.pdf
III. FABRICI DE CIMENT
IV. SINDICATE
V. ONG