1. Uncertainty and environmental learning 1, 2Reconceiving science and policy in the preventive paradigm
2. EEA , Late Lessons From Early Warnings: The Precautionary Principle 1896–2000, European Environmental Agency, Copenhagen, 2001
3. The known unknowns of nanomaterials: Describing and characterizing uncertainty within environmental, health and safety risks
4. RCEP , Twenty-Seventh Report Novel Materials in the Environment: The Case of Nanotechnology Royal Commission on Environmental Pollution, The Stationery Office, Norwich, 2008
5. S. F. Hansen , Regulation and Risk Assessment of Nanomaterials – Too Little, Too Late?, Technical University of Denmark, Kgs. Lyngby, 2009