1. Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast)
2. European Commission Enterprise and Industry. Guide to the application of the Machinery Directive 2006/42/EC. 2nd Edition. June 2010. General Editor Ian Fraser
3. Schneider, E.: Noise in figures. European Agency for Safety and Health at Work. https://osha.europa.eu/en/tools-and-publications/publications/reports/6905723 (2005). Accessed 31 Jan 2016
4. Patel, J.: Survey of noise emission and risk information supplied with a range of work machinery. HSE Research Report RR962. www.hse.gov.uk/research/rrpdf/rr962.pdf (2013). Accessed 31 Jan 2016
5. Noise-induced hearing loss (NIHL) in Great Britain. http://www.hse.gov.uk/Statistics/causdis/deafness/index.htm . Accessed 31 Jan 2016