Homnan, B., and W. Benjapolakul. “An Evaluation of Significant Lightness Difference Effective Term for CIEDE2000 Comparative Image Colour Pixels”. ECTI Transactions on Computer and Information Technology (ECTI-CIT), vol. 9, no. 2, Apr. 2016, pp. 160-72, doi:10.37936/ecti-cit.201592.54419.