1. Sand A, Sørensen A, Caspersen N. KEW Industri A/S: high pressure cleaners. In: Wenzel H, Hauschild MZ, Alting L, editors. Environmental assessment of products. Vol. 1—Methodology, tools, techniques and case studies. London: Chapman and Hall, 1997.
2. Consoli F, Allen D, Boustead I, Fava J, Franklin W, Jensen AA, de Oude N, Parrish R, Perriman R, Postlethwaite D, Quay B, Séguin J, Vigon B. Guidelines for life-cycle assessment: a “code of practice”. From the SETAC Workshop held in Sesimbra, Portugal, 31 March–3 April, 1993. Brussels: Society of Environmental Toxicology and Chemistry (SETAC), 1993.
3. International Standard for Organization: Environmental management–life cycle assessment—principles and framework. ISO/DIS 14040, Draft 1996.
4. Fate computer program: fate model program, version 1. OH: University of Cincinnati, US-EPA PB 91 507137, 1991.
5. Wenzel H, Hauschild MZ, Alting L. Environmental assessment of products. Vol. 1—Methodology, tools, techniques and case studies. London: Chapmann and Hall, 1997.