Beccaceci, S; Muhunthan, D; Butterfield, D M; Gilham, R; Tompkins, J; Sweeney, B; Brown, R J C; Quincey, P; Green, D*; Alexander, J*; Grieve, A* (2010) CPEA 28: Airborne particulate concentrations and numbers in the United Kingdom (phase 2) 2009 annual audit report. NPL Report. AS 51

Gilham, R; Quincey, P (2007) Particle measurement programme - analysis of errors. NPL Report. AS 17