[1]Jezoetal.[Pharmazie,1958,vol.13,p.195,198]
[1]Rogers;Henze[JournaloftheAmericanChemicalSociety,1940,vol.62,p.1759]
[1]Richter[AnalesdelaRealSociedadEspanoladeFisicayQuimica,vol.26,p.129][ChemischesZentralblatt,1928,vol.99,#II,p.40]
[1]Koelsch[JournaloftheAmericanChemicalSociety,1943,vol.65,p.2458]
[1]Blicke;Biel[JournaloftheAmericanChemicalSociety,1954,vol.76,p.3163,3165]