参考文献
Knecht; Thompson
Journal of the Society of Dyers and Colourists, vol. 36, p. 217
Chem. Zentralbl., 1920 , vol. 91, # IV p. 457
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Thompson
Journal of the Society of Dyers and Colourists, vol. 37, p. 7
Chem. News J. Ind. Sci., 1921 , vol. 122, p. 41
Chem. Zentralbl., 1921 , vol. 92, # I p. 491