1. Peer Reviewed: When Synthetic Chemicals Degrade in the Environment
2. Cefic—The European Chemical Industry Council. Facts and Figures of the European Chemical Industry 2016; 2016.
3. Evans, T. D. Sewage Sludge: Operational and Environmental Issues FR/R0001-Review of Current Knowledge. Found. Water Res., 4th ed. 2016, p 146.
4. Council of the European Union. Council Directive of 12 June 1986
on the Protection of the Environment, and in Particular of the Soil,
When Sewage Sludge Is Used in Agriculture; 1986.