1. Directive 2000/60/EC of the European Parliament and of the Council Establishing a Framework for the Community Action in the Field of Water Policy. (http://eur-lex.europa.eu/LexUriServ/site/en/oj/2000/l_327/l_32720001222en00010072.pdf)
2. Monitoring freshwater sediments
3. P.-D. Hansen, J. Blasco, A. De Valls, V. Poulsen, M. van den Heuvel-Greve, Biological analysis (Bioassays, biomarkers, biosensors), in Sustainable Management of Sediment Resources, Vol. 2: Sediment Quality and Impact Assessment of Pollutants (Eds: D. Barceló and M. Petrovic), Elsevier Publishers, Amsterdam, London, New York 2007, 131–161.
4. A. Lange, M. Maras, W. M. De Coen, Bioassays and biosensors: Capturing in a nutshell, in Ecotoxicological Testing of Marine and Freshwater Ecosystems: Emerging Techniques, Trends and Strategies (Eds: P. J. den Besten, M. Munawar), Taylor and Francis, Boca Raton, London 2005, 177–190.