Hanson, A R; Taylor, J A F; Basu, M A; Williams, D C; Zwinkels, J*; Czepluch, W* (2000) Report on project QR9816B1 gloss measurements at NPL. NPL Report. COEM 47
Zwinkels, J*; Sperling, S*; Goodman, T; Campos Acosta, J*; Ohno, Y*; Rastello, M L*; Stock, M*; Woolliams, E R (2016) Mise en pratique for the definition of the candela and associated derived units for photometric and radiometric quantities in the International System of Units (SI). Metrologia, 53 (3). G1.