1. D. R. Waring and G. Hallas, “The Chemistry and Application of Dyes”, Plenum Press, New York, 1990.
2. D. M. Lewis, “Wool Dyeing”, Society of Dyers and Colorists, Bradford, 1992.
3. A. Johnson, “The Theory of Coloration of Textiles”, 2nd ed., Society of Dyers and Colorists, Bradford, 1989.
4. S. M. Burkinshaw, “Physico-chemical Aspects of Textile Coloration”, Society of Dyers and Colorists, Bradford, 2015.
5. X. Wang and M. Bide, Textile Chemist and Colorist, 30, 45 (1998).