参考文献
Sen; Ghosh
Journal of the Indian Chemical Society, 1927 , vol. 4, p. 484
Chem. Zentralbl., 1928 , vol. 99, # I p. 511
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Sen; Mondal
Journal of the Indian Chemical Society, 1928 , vol. 5, p. 626
Chem. Zentralbl., 1929 , vol. 100, # I p. 1101