[1]Dreux[BulletindelaSocieteChimiquedeFrance,1955,p.521,523]
[1]Westfahl;Gresham[JournaloftheAmericanChemicalSociety,1955,vol.77,p.936,938]
[1]Dreux[BulletindelaSocieteChimiquedeFrance,1955,p.521,523]Colongeetal.[BulletindelaSocieteChimiquedeFrance,1959,p.1244,1246]
[1]Bergmann;Herman[JournalofAppliedChemistry,1953,vol.3,p.42,48]
[1]Wiemann,J.;Jon,M.[BulletindelaSocieteChimiquedeFrance,1960,p.937-943]