[1]JournaloftheAmericanChemicalSociety,1948,vol.70,p.2572 JournaloftheAmericanChemicalSociety,1949,vol.71,p.6,8
[1]JournaloftheChemicalSociety,1948,p.2129,2132
[1]JournalfurpraktischeChemie(Leipzig1954),1989,vol.331,p.75-81
[1]JournalfurpraktischeChemie(Leipzig1954),1989,vol.331,p.75-81