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[1]JournaloftheAmericanChemicalSociety,1911,vol.33,p.1773
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[1]ChemischeBerichte,1887,vol.20,p.2202
[1]JournaloftheAmericanChemicalSociety,1926,vol.48,p.2202,2206
[1]ChemischeBerichte,1913,vol.46,p.3978