1. Wenzel H, Hauschild M, Airing L (1997): Environmental Assessment of Products. Vol. 1-Methodology, tools and case studies in product development. First edition. Chapman & Hall, United Kingdom, Kluwer Academic Publishers, Hingham, MA. USA. ISBN 0-412-80800-5
2. Guinée JB (ed) (2001): Life Cycle Assessment: An operational guide to the ISO Standards; LCA in Perspective; Guide; Operational Annex to Guide. Centre for Environmental Science, Leiden University, The Netherlands. May 2001
3. Goedkoop M, Effting S, Collignon M (2000): The Eco-indicator 99-A damage oriented method for Life Cycle Impact Assessment. Manual for Designers. Second edition 17-4-2000. PRé Consultants B.V., Amersfoort, The Netherlands
4. Udo de Haes HA (ed.) (1996): Towards a methodology for life cycle impact assessment. Society of Environmental Toxicology and Chemistry (SETAC-Europe), Brussels, 1996
5. Udo de Haes HA, Jolliet O, Finnveden G, Hauschild M, Krewitt W, Müller-Wenk R (1999): Best available practice regarding impact categories and category indicators in life cycle impact assessment. Int J LCA 4 (2) 1–15, 1999