参考文献
Loefgren; Takman
Acta Chemica Scandinavica (1947-1973), 1952 , vol. 6, p. 1006,1008
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Hach; Protiva
Chemicke Listy, 1953 , vol. 47, p. 729,730
Collection of Czechoslovak Chemical Communications, 1953 , vol. 18, p. 684,686
Chem.Abstr., 1955 , p. 204