参考文献
Hantzsch; Wolvekamp
Justus Liebigs Annalen der Chemie, 1904 , vol. 331, p. 279
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Klason
Journal fuer Praktische Chemie (Leipzig), 1888 , vol. <2> 38, p. 368,372
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Stokes; Cain
Journal of the American Chemical Society, 1907 , vol. 29, p. 445