参考文献
Wideqvist
Arkiv foer Kemi, 1947 , vol. 23 B, # 4 p. 3
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Hommelen
Bulletin des Societes Chimiques Belges, 1933 , vol. 42, p. 243,249
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Wrede; Rothhaas
Chemische Berichte, 1934 , vol. 67, p. 739
Hoppe-Seyler's Zeitschrift fuer Physiologische Chemie, 1934 , vol. 226, p. 95,97,102