1. CO2PE! – Initiative (Cooperative Effort on Process Emissions in Manufacturing), http://www.mech.kuleuven.be/co2pe.
2. Environmental Management Systems—Requirements with Guidance for Use;ISO 14001,2004
3. Environmentally Benign Manufacturing: Observations From Japan, Europe and the United States;Gutowski;Journal of Cleaner Production,2005
4. Environmental Management – Life Cycle Assessment – Principles and Framework;ISO 14040,2006
5. Environmental Management – Life Cycle Assessment – Requirements and Guidelines;ISO 14044,2006