WWF Studie: Der Wasser-Fußabdruck Deutschlands
http://www.wwf.de/fileadmin/fm-wwf/pdf_neu/wwf_studie_wasserfussabdruck.pdf

PAS 2050:2008: Specification for the assessment of the lifecycle greenhouse gas emissions of goods and services
http://www.bsigroup.com/en/BSIGroup/sectorsandservices/Forms/PAS-2050-Form-page/

Guide to PAS 2050: How to assess the carbon footprint of goods and services
http://www.bsigroup.com/en/BSIGroup/sectorsandservices/Forms/PAS-2050-Form-page/

The Greenhouse Gas Protocol: A Corporate Accounting and Reporting Standard
http://www.ghgprotocol.org/files/ghgp/public/ghg-protocol-revised.pdf

The Greenhouse Gas Protocol: Product Life Cycle Accounting and Reprting Standard
http://www.ghgprotocol.org/feature/download-new-ghg-protocol-product-life-cycle-standard

The Greenhouse Gas Protocol: Corporate Value Chain (Scope 3) Accounting and Reporting Standard
http://www.ghgprotocol.org/feature/download-new-ghg-protocol-corporate-value-chain-scope-3-standard

BMU, UBA, Öko-Institut: Memorandum Product Carbon Footprint
http://www.bmu.de/files/pdfs/allgemein/application/pdf/memorandum_pcf_lang_bf.pdf

BMU, BDI: Produktbezogene Klimaschutzstrategien: Product Carbon Footprint verstehen und nutzen
http://www.bdi.eu/download_content/KlimaUndUmwelt/PCF-Leitfaden_100810_Online.pdf