-
Muehle, Chemische Berichte, 1913, vol. 46, p. 2098
-
Kasanski, Zhurnal Russkago Fiziko-Khimicheskago Obshchestva, 1900, vol. 32, p. 154
-
Dijew, Journal fur praktische Chemie (Leipzig 1954), 1889, vol. <2>39, p. 341,345
-
Gruen, Chemische Berichte, 1909, vol. 42, p. 3762
-
Kasanski, Journal fur praktische Chemie (Leipzig 1954), 1900, vol. <2>62, p. 368