Kammenga, J. E., Dallinger, R., Donker, M. H., Köhler, H.-R.
, Simonsen, V., Triebskorn, R. & Weeks, J. M. (2000).
Biomarkers in Terrestrial Invertebrates for Ecotoxicological Soil Risk Assessment.
Reviews of Environmental Contamination and Toxicology,
164, 93-147.
Løkke, H., Bak, J., Bobbink, R., Bull, K., Curtis, C., Falkengren-Grerup, U., Forsius, M., Gundersen, P., Hornung, M., Skjelkvåle, B. L., Starr, M. & Tybirk, K. (2000).
Critical Loads Copenhagen 1999, 21st-25th November 1999. Critical Loads. Danmarks Miljøundersøgelser, Aarhus Universitet. Arbejdsrapport fra DMU Bind 121
http://www2.dmu.dk/1_viden/2_Publikationer/3_arbrapporter/rapporter/AR121.pdf