Michael; Schulthess Journal fuer Praktische Chemie (Leipzig), 1892 , vol. <2>46, p. 263 Journal fuer Praktische Chemie (Leipzig), 1895 , vol. <2>52, p. 368 Full Text Show Details Skau; Saxton Journal of the American Chemical Society, 1928 , vol. 50, p. 2696 Full Text Show Details Scheibler; Voss Chemische Berichte, 1920 , vol. 53, p. 384