Goldschmidt; Poltzer Chemische Berichte, 1891 , vol. 24, p. 1002 Full Text Show Details Meldola; Forster Journal of the Chemical Society, 1891 , vol. 59, p. 697 Full Text Show Details Fischer,O. Journal fuer Praktische Chemie (Leipzig), 1922 , vol. <2> 104, p. 102 Journal fuer Praktische Chemie (Leipzig), 1924 , vol. <2> 107, p. 16 Full Text Show Details Gold; Rosell Chemische Berichte, 1890 , vol. 23, p. 506