(2) Newhall, S.M., Nickerson, D. and Judd, D.B., “Final Report of the O.S.A. Subcommittee on the Spacing of the Munsell Colors“ Jour. Opt. Soc. Amer., Vol. 33, pp385-418, (1943)
(3) Japanese Standard Association, “Colour specification —Specification according to their three attributes“ JIS Z 8721 (1993)
(5) IKEDA, K., NAKAYAMA, M. and OBARA, K., "Comparison of Perceived Colour-Differences of Colour Chips with their Colorimetric ones in the CIE 1976 L*u*v* and the CIE 1976 L*a*b* Uniform Colour Spaces" Publication CIE, No. 50, pp83-89, (1980)