1. AnschũtzBerichte, 1897,30, 221;cf. Brit. Chem. Abs., 1897,219 Annalen, 1887,239, 314 and 333.
2. Jean-RenaudBerichte, 1889,22, 1273;cf. Brit. Chem. Abs.,1889, 870.
3. Angelli and CastellanaBrit. Chem. Abs., 1909,1, 308.
4. NöltingBerichte, 1897,30, 2581;cf. Brit. Chem. Abs., 1898, 143.
5. Pfeifferet al. Annalen, 1913,398, 137–96;cf. Brit. Chem. Abs., 1913,104 (i), 879.