1. Klöpffer, W.: Environmental Hazard Assessment of Chemicals and Products. Part I. General Assessment Principles. Environ. Sci. & Pollut. Res. International1 (1) (1994) 47–53
2. Klöpffer, W.: Persistenz und Abbaubarkeit in der Beurteilung des Umweltverhaltens anthropogener Chemikalien. UWSF-Z. Umweltchem. Ökotox.1 Nr. 2 (1989) 43–51
3. Frick, G.W. (Ed.): Environmental Glossary. 2nd Edition. Government. Institutes, Inc., Rockville (MD), USA 1982
4. Council Directive 79/831 /EEC Amending for the Sixth Time Directive 67/548/EEC on the Classification, Packaging and Labelling of Dangerous Substances. Off. J. L 259/10 15 October 1979
5. Cairns, J., Jr.: Politics, Economics, Science — Going Beyond Disciplinary Boundaries to Protect Aquatic Ecosystems. In:Evans, M.S. (Ed.): Toxic Contaminants an Ecosystem Health, A Great Lakes Focus. John Wiley and Sons, New York 1988