[1]Patent:US2830988,1955,
[1]Patent:US2830988,1955,
[1]JournaloftheAmericanChemicalSociety,1958,vol.80,p.4618
[2]ComptesRendusHebdomadairesdesSeancesdel'AcademiedesSciences,1958,vol.247,p.2159
[1]JournaloftheAmericanChemicalSociety,1958,vol.80,p.4618
[1]ComptesRendusHebdomadairesdesSeancesdel'AcademiedesSciences,1959,vol.248,p.984