4MARK G, MICHIEL O, CHRIS G. Simapro 5. 1 reference manual[R]. Netherlands: PRe Consultants, 2003. 37-55.
5SETAC-Europe. Proceedings of life-cycle assessment workshop[M]. Brussels, Belgium:SETAC-Europe,1991.
6CONSOLI F, ALLEN D, BOUSTEAD I, et al. Guidelines for life-cycle assessment: a "code of practice" [M]. Brussels,Belgium: Society of Environmental Toxicology and Chemistry (SETAC), 1993.