1. “Gmelin Handbuch der Anorganischen Chemie, Uranium,” System No. 55. Springer-Verlag, Berlin. See supplementary volumes, refs. 1a–1j
2. W.T. Carnall, Hannah M. Crosswhite, Henry M. Crosswhite, H.R. Hoekstra, D.J. Lam, B.W. Veal, B. Kanellakopulos, A5, “Spectra,” K.- C. Buschbeck, C. Keller, 1982
3. S.R. Bierman, E.D. Clayton, R.G. Denning, J. Fuger, H. Gusten, B. Kanellakopulos, K. Rossler, A6, “General Properties,” K.- C. Buschbeck, C. Keller, 1983
4. L. Berg, W. Carl, H. Keller-Rudek, E. Koch, A. Leonard, P. Stiess, Cl, “Compounds with Hydrogen and the U-O System,” L. Berg, R. Keim, P. Merlet, 1977
5. W. Bacher, E. Jacob, C8, “Compounds with Fluorine,” C. Keller, R. Keim, 1980