1. The computational structure of life cycle assessment;Heijungs,2002
2. Zhang Aling, China clean coal technologies comprehensive investigation and policies research, Institute of Nuclear and New Energy T echnology, Tsinghua University, 2003(.(in Chinese)).
3. Handbook on life cycle assessment: operational guide to the ISO standards;Jeroen,2002
4. Yang Jianxin and others, Products life cycle assessment and application, Beijing: Meteorology Press, 2002(.(in Chinese)).