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Liu, Z.; Mehta, A.; Tamura, N.; Pickard, D.; Rong, B.; Zhou, T.; Pianetta, P. (2007). "Influence of Taoism on the invention of the purple pigment used on the Qin terracotta warriors". Journal of Archaeological Science. 34 (11): 1878. Bibcode:2007JArSc..34.1878L. doi:10.1016/j.jas.2007.01.005. ISSN0305-4403. S2CID17797649.
Tager, A.; Kirchner, E.; Fedorovskaya, E. (2021). "Computational evidence of first extensive usage of violet in the 1860s". Color Research & Application. 46 (5): 961–977. doi:10.1002/col.22638. S2CID233671776.
Tager, A.; Kirchner, E.; Fedorovskaya, E. (2021). "Computational evidence of first extensive usage of violet in the 1860s". Color Research & Application. 46 (5): 961–977. doi:10.1002/col.22638. S2CID233671776.
Anthony S. Travis (1990). "Perkin's Mauve: Ancestor of the Organic Chemical Industry". Technology and Culture. 31 (1): 51–82. doi:10.2307/3105760. JSTOR3105760. S2CID112031120.
Liu, Z.; Mehta, A.; Tamura, N.; Pickard, D.; Rong, B.; Zhou, T.; Pianetta, P. (2007). "Influence of Taoism on the invention of the purple pigment used on the Qin terracotta warriors". Journal of Archaeological Science. 34 (11): 1878. Bibcode:2007JArSc..34.1878L. doi:10.1016/j.jas.2007.01.005. ISSN0305-4403. S2CID17797649.