[1]JournaloftheAmericanChemicalSociety,1956,vol.78,p.784,787 JournaloftheAmericanChemicalSociety,1957,vol.79,p.6407,6413
[1]JournaloftheAmericanChemicalSociety,1956,vol.78,p.784,787 JournaloftheAmericanChemicalSociety,1957,vol.79,p.6407,6413
[1]JournaloftheAmericanChemicalSociety,1956,vol.78,p.784,787 JournaloftheAmericanChemicalSociety,1957,vol.79,p.6407,6413
[1]Heterocycles,1995,vol.41,p.507-514