Schmidt,M.; Siebert,W. Chemische Berichte, 1969 , vol. 102, p. 2752 - 2763 Full Text Show Details Schmidt; Siebert Angewandte Chemie, 1964 , vol. 76, p. 687 Full Text Show Details Schmidt, M.; Siebert, W. Angewandte Chemie, International Edition in English, 1964 , vol. 3, p. 637 - 638 Full Text Show Details Gmelin Handbook: S: SVol.4a/b, 2.2.3.6, page 421 - 424