1. 1) EC (1989) Council Directive 89/391/EEC of the 12 June 1989 on the introduction of measures to encourage improvements in the safety and health of workers at work.
2. 2) EC (1998) Council Directive 98/24/EC of the 7 April 1998 on the protection of the health and safety of workers from the risks related to chemical agents at work (fourteenth individual Directive within the meaning of Article 16(1) of Directive 89/391/EEC).
3. 3) Borm PJA, Robbins D, Haubold S, Kuhlbusch T, Fissan H, Donaldson K, Schins R, Stone V, Kreyling W, Lademann J, Krutmann J, Warheit D, Oberdorster E (2006) The potential risks of nanomaterials: a review carried out for ECETOC. Part Fibre Toxicol 3, 11.
4. 4) Maynard AD, Aitken RJ, Butz T, Colvin V, Donaldson K, Oberdörster G, Philbert MA, Ryan J, Seaton A, Stone V, Tinkle SS, Tran L, Walker NJ, Warheit DB (2006) Safe handling of nanotechnology. Nature 444, 267–9.
5. 5) Ricaud M, Witschger O (2009) Nanomaterials − Definitions, toxicological risk, characterisation of occupational exposure and prevention measures. INRS, ED 6050.