White, H M; Campbell, C (2003) The synthesis of L-band wavelength references via four-wave mixing. NPL Report. CETM 53

Libert, J M*; Kelley, E F*; Boynton, P A*; Brown, S W*; Wall, C F; Campbell, C (2003) Color gamut assessment standard: construction, characterization and interlaboratory measurement comparison. Proc. SPIE - Int. Soc. Opt. Eng., 4826. pp. 146-164.

Humphreys, D A; Campbell, C (2001) Preliminary results of L-band exited-state optical frequency reference survey. In: OFMC'01 6th Optical Fibre Measurement Conference, 26-28 September 2001, Girton College, Cambridge, UK.