Gmelin Handbook: S: SVol.4a/b, 1.1.4.8, page 23 - 25 Full Text Show Details Hake, A.; Leitner, R. in: W. Foerst, Ullmanns Encyklopaedie der technischen Chemie, 3rd Ed., Vol. 15, Muenchen-Berlin 1964, pp. 532/55 Full Text Show Details Standen, A.; Mark, H. F.; McKetta, Jr. J. J.; Othmer, D. F. Kirk-Othmer Encycl. Chem. Technol. 2nd Ed. 4 (1964) 373/4