1. Ahbe S, Braunschweig A, Müller-Wenk R (1990): Methodik für oekobilanzen auf der basis ökologischcr optimierung (A method for ecobalance and ecological optimisation), Bundesamt für Umwelt, Wald und Landschaft (BUWAL), Bern, Schriftenreihe Urnwelt Nr. 133
2. Barnthouse L, Fava J, Humphreys K, Hunt R, Laibsn L, Noesen S, Norris G, Owens J, Todd J, Vigon B, Weitz K, Young J, Eds (1997): Life-Cycle Impact Assessment: The State-of-the-Art. Society of Environmental Toxicology and Chemistry (SETAC) and SETAC Foundation for Environmental Education, Pensacoa, Florida, USA
3. Baumann, H Rydberg T (1994): A comparison of three methods for impact analysis and valuation. Journal of Cleaner Production 2, 13–20
4. Borcherding K, Eppel T, von Winterfeldt D (1991): Comparison of weighting judgements in multiattribute utility measurement. Management Science 37, 1603–1619
5. 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, Eds (1993): Guidelines for life-cycle assessment: A ‘Code of Practice’, Society of Environmental Toxicology and Chemistry (SETAC), Brussels