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[2]JournaloftheChemicalSociety,1938,p.28
[1]JournaloftheChemicalSociety,1937,p.367 JournaloftheChemicalSociety,1938,p.28
[1]YakugakuZasshi/JournalofthePharmaceuticalSocietyofJapan,1942,vol.62,p.417,443;dtsch.Ref.S.122,125 Chem.Abstr.,1951,p.4724
[1]JournaloftheChemicalSociety,1937,p.367 JournaloftheChemicalSociety,1938,p.28
[1]JournaloftheChemicalSociety,1954,p.3057,3060
[1]Synthesis,1981,p.397-400