参考文献
Claus; Schweitzer
Chemische Berichte, 1886 , vol. 19, p. 931
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v. Walther; Zipper
Journal fuer Praktische Chemie (Leipzig), 1915 , vol. <2> 91, p. 380
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Crowther; McCombie
Journal of the Chemical Society, 1913 , vol. 103, p. 547