[1]JournaloftheChemicalSociety.PerkintransactionsI,1991,p.2877-2882
[1]JournaloftheChemicalSociety.PerkintransactionsI,1991,p.2877-2882
[2]JournaloftheChemicalSociety.PerkintransactionsI,1991,p.2877-2882
[1]JournaloftheAmericanChemicalSociety,1956,vol.78,p.2141,2144