参考文献
Fittig
Justus Liebigs Annalen der Chemie, 1877 , vol. 188, p. 72
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Crasso
Justus Liebigs Annalen der Chemie, 1840 , vol. 34, p. 70
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Robiquet
Justus Liebigs Annalen der Chemie, 1838 , vol. 25, p. 139,144