http://www.hse.gov.uk/pubns/books/hsg53.htm (Selection, Use, Maintenance and Management of RPD programmes)
http://www.hse.gov.uk/news/2009/fit-testing-poster.pdf (Correct fitting and fit testing of filtering facepiece respirators)
http://www.hse.gov.uk/asbestos/stakeholdermeeting220405.pdf (Report of the stakeholders meeting on respiratory protective equipment fit testing)