参考文献
Fittig
Justus Liebigs Annalen der Chemie, 1867 , vol. 141, p. 134
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Schmitz
Justus Liebigs Annalen der Chemie, 1878 , vol. 193, p. 162,166
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Fittig; Brueckner
Justus Liebigs Annalen der Chemie, 1868 , vol. 147, p. 50