[1]JournalofgeneralchemistryoftheUSSR,1967,vol.37,p.1331-1335 ZhurnalObshcheiKhimii,1967,vol.37,p.1402-1407
[1]JournalofgeneralchemistryoftheUSSR,1967,vol.37,p.1331-1335 ZhurnalObshcheiKhimii,1967,vol.37,p.1402-1407
[1]JournaloftheChemicalSociety,1965,p.5015-5031
[1]JournaloftheChemicalSociety,1965,p.5015-5031
[1]JournalofHeterocyclicChemistry,1967,vol.4,p.75-79