[1]ArchivderPharmazie,1981,vol.314,p.289-293
[2]GazzettaChimicaItaliana,1956,vol.86,p.275,279
[1]GazzettaChimicaItaliana,1956,vol.86,p.275,279
[1]JournaloftheChemicalSociety,1956,p.361,364
[1]GazzettaChimicaItaliana,1956,vol.86,p.275,279
[1]JournaloftheAmericanChemicalSociety,1958,vol.80,p.1662