1. International Reference Life Cycle Data System (ILCD) Handbook - General Guide for Life Cycle Assessment - Detailed Guidance;EC-JRC,2010
2. International Reference Life Cycle Data System (ILCD) Handbook - Specific Guide for Life Cycle Inventory Data Sets;EC-JRC,2010
3. Product Environmental Footprint (PEF) Guide;EC,2012
4. Product Environmental Footprint Category Rules Guidance. Version 6.3, PEFCR Guidance Document;EC,2018
5. Life cycle inventory analysis;Babu,2006