参考文献
Baur
Chemische Berichte, 1891 , vol. 24, p. 2842
Chemische Berichte, 1894 , vol. 27, p. 1606
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Konowalow
Zhurnal Russkago Fiziko-Khimicheskago Obshchestva, 1898 , vol. 30, p. 1036
Chem. Zentralbl., 1899 , vol. 70, # I p. 777