1. The Royal Society: RS/RAE. Nanoscience and Nanotechnologies: Opportunities and Uncertainties. London, UK: The Royal Society and the Royal Academy of Engineering; 2004. 113 p
2. ETC Group. No Small Matter II: The Case for a Global Moratorium. Size Matters! Winnipeg, Canada: ETC Group; 2002. 20 p
3. OECD/Allianz. Small sizes that matter: Opportunities and risks of nanotechnologies [Internet]. 2003. Available from: https://www.oecd.org/science/nanosafety/44108334.pdf [Accessed: 2019-01-10]
4. European Commission. Nanotechnologies: A preliminary risk analysis on the basis of a workshop organized in Brussels on 1-2 March 2004 by the health and consumer protection directorate general of the European Commission [Internet]. 2004. Available from: https://ec.europa.eu/health/ph_risk/documents/ev_20040301_en.pdf [Accessed: 2019-01-10]
5. Swiss Reinsurance Company [Internet]. Available from: https://www.nanowerk.com/nanotechnology/reports/reportpdf/report93.pdf [Accessed: 2019-01-10]