[1]Ford-Moore[JournaloftheChemicalSociety,1949,p.2433,2440]
[1]Hassan;Srivastava[CurrentScience,1945,vol.14,p.107]
[1]Halberkann[ChemischeBerichte,1921,vol.54,p.1837]
[1]Rassow;Doehle;Reim[JournalfurpraktischeChemie(Leipzig1954),1916,vol.<2>93,p.192]
[1]Fierz-David;Blangey;Streiff[HelveticaChimicaActa,1946,vol.29,p.1718,1758]