"Sustainability Leaders"(PDF). Dow Jones Sustainability Indexes. SAM Indexes GmbH. 3 March 2009. Archived from the original(PDF) on 16 July 2011. Retrieved 6 July 2009.
"Sustainability Leaders"(PDF). Dow Jones Sustainability Indexes. SAM Indexes GmbH. 3 March 2009. Archived from the original(PDF) on 16 July 2011. Retrieved 6 July 2009.