1. ISO 14040, Environmental management – Life cycle assessment – Principles and framework, 2006/2018.
2. ISO 14044, Environmental management – Life cycle assessment – Requirements and guidelines, 2006/2018.
3. W. Klöpffer und B. Grahl, Ökobilanz (LCA) – Ein Leitfaden für Ausbildung und Beruf. Weinheim: Wiley-VHC Verlag, 2009.
4. Greenhouse gases – Carbon footprint of products – Requirements and guidelines for quantification, 14067, ISO 1467, 2018.
5. Greenhouse Gas Protocol: a Corporate Accounting and Reporting Standard, World Business Council for Sustainable Development und World Resources Institute, 2004.