D. M. Kiefer "Organic Chemicals' Mauve Beginning" Chem. Eng. News Archive, 1993, vol.71, pp 22–23. doi:10.1021/cen-v071n032.p022
Elmar Steingruber "Indigo and Indigo Colorants" Ullmann's Encyclopedia of Industrial Chemistry 2004, Wiley-VCH, Weinheim. doi: 10.1002/14356007.a14_149.pub2
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Clayden, N. Greeves & S. Warren. Organic Chemistry. Oxford University Press. 2012: pp. 1–15 [2013-12-16]. ISBN 0199270295. (原始内容存档于2013-12-16). 引文格式1维护:冗余文本 (link)
Clayden, N. Greeves & S. Warren. Organic Chemistry. Oxford University Press. 2012: pp. 1–15 [2013-12-16]. ISBN 0199270295. (原始内容存档于2013-12-16). 引文格式1维护:冗余文本 (link)