1. The Nanotech Report 2004 (Lux Research, New York, 2001).
2. Harremoës, P. et al. Late Lessons from Early Warnings: The Precautionary Principle 1896–2000 (European Environmental Agency, Copenhagen, 2001).
3. The Royal Society & The Royal Academy of Engineering. Nanoscience and Nanotechnologies: Opportunities and Uncertainties (Royal Society, London, 2004).
4. Scientific Committee on Emerging and Newly-Identified Health Risks (SCENIHR) The Appropriateness of the Risk Assessment Methodology in Accordance with the Technical Guidance Documents for New and Existing Substances for Assessing the Risks of Nanomaterials (European Commission, Brussels, 2007)
5. Moore, M. N. Environment International 32, 967–976 (2006).