[1]ChemistryofHeterocyclicCompounds,1999,vol.35,p.871-874
[2]JournaloftheAmericanChemicalSociety,1953,vol.75,p.1933,1934
[1]JournaloftheAmericanChemicalSociety,1953,vol.75,p.1933,1934
[1]Luiksaar;Belen'kii;Krayushkin[ChemistryofHeterocyclicCompounds,1999,vol.35,#7,p.871-874]
[1]Luiksaar;Belen'kii;Krayushkin[ChemistryofHeterocyclicCompounds,1999,vol.35,#7,p.871-874]