参考文献
Tommila
Suomen Kemistilehti B, 1933 , vol. 6, p. 70
Annales Academiae Scientiarum Fennicae, Series A, 1933 , vol. 38, # 6 p. 1 - 56
Chem. Zentralbl., 1934 , vol. 105, # I p. 830,2721
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Tommila
Annales Academiae Scientiarum Fennicae, Series A, 1936 , vol. 46, # 6 p. 83
Chem. Zentralbl., 1937 , vol. 108, # II p. 204