[1]BulletindelaSocieteChimiquedeFrance,1957,p.721,723
[1]ChemistryofHeterocyclicCompounds,1992,vol.28,p.71-75 KhimiyaGeterotsiklicheskikhSoedinenii,1992,p.80-85
[2]JournalofOrganicChemistry,1958,vol.23,p.1358
[1]JournalofOrganicChemistry,1958,vol.23,p.1358
[1]BulletindelaSocieteChimiquedeFrance,1957,p.721,723
[1]ChemistryofHeterocyclicCompounds,1992,vol.28,p.71-75 KhimiyaGeterotsiklicheskikhSoedinenii,1992,p.80-85