[1]JustusLiebigsAnnalenderChemie,1928,vol.460,p.98 JustusLiebigsAnnalenderChemie,1930,vol.478,p.141
[1]JustusLiebigsAnnalenderChemie,1936,vol.524,p.189,198
[2]JustusLiebigsAnnalenderChemie,1936,vol.524,p.189,198
[1]JustusLiebigsAnnalenderChemie,1936,vol.524,p.189,198
[1]JournaloftheChemicalSociety,1956,p.2452
[1]JustusLiebigsAnnalenderChemie,1936,vol.524,p.189,198