[1]Boessneck[ChemischeBerichte,1886,vol.19,p.1757]
[2]Bankiewicz[ChemischeBerichte,1889,vol.22,p.1399]
[3]Maron;Salzberg[ChemischeBerichte,1911,vol.44,p.3004]
[4]Green;Day[JournaloftheAmericanChemicalSociety,1942,vol.64,p.1167,1170]
[5]Green;Day[JournaloftheAmericanChemicalSociety,1942,vol.64,p.1167,1170]
[6]Green;Day[JournaloftheAmericanChemicalSociety,1942,vol.64,p.1167,1170]
[7]Boessneck[ChemischeBerichte,1886,vol.19,p.1757]
[8]Maron;Salzberg[ChemischeBerichte,1911,vol.44,p.3004]