1. CEN . (1993) EN 481 Centre European de Normalisation Workplace atmospheres: Size fraction definitions for measurement of airborne particles in the workplace, European Committee for Standardisation, rue de Stassart, 36 B-1050 Brussels, Belgium.
2. CEN . (2001) EN 149, Respiratory protective devices — Filtering half masks to protect against particles —Requirements, testing, marking European Committee for Standardisation, rue de Stassart, 36 B-1050 Brussels, Belgium, ISBN 978 0 580 62117 8
3. CEN . (2005) EN 529 Respiratory protective devices — Recommendations for selection, use, care and maintenance — Guidance document B-1050 European Committee for Standardisation, rue de Stassart, 36 B-1050 Brussels, Belgium, ISBN 0580469085
4. CEN . (2014) EN 13205-2, Workplace exposure. Assessment of sampler performance for measurement of airborne particle concentrations. Brussels, Belgium: Laboratory performance test based on determination of sampling efficiency European Committee for Standardisation, rue de Stassart, 36 B-1050 Brussels, Belgium. ISBN 978 0 580 78059 2
5. Howie M Johnstone J Weston P (1996) Workplace effectiveness of respiratory protective equipment for asbestos removal work. HSE Contract Research Report 112. London: HMSO.