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(71.2): L. Brewer, J. opt. Soc. Am., 1971, 61, 1666-82.

(78.8): L.A. Korostyleva and Y. P. Dontsov, Tables of Spectral lines of neutral and ionized atoms of uranium, Acad. Sci. S.S.S.R., Moscow, 1978, 221 pp.

(80.1): J.O. Berg, T.E. Christensen, P.W. Kidd, G.R. Neil and J.G. Conway, J. opt. Soc. Am., 1980, 70, 716-9.

(82.1): R.T. Schneider and T.E. Roxey, Appl. Opt., U.S.A., 1982, 21, 4204-6.

(82.3): H.M. Crosswhite, Gmelin Handbook of inorganic chemistry, 8th edition, Uranium Suppl., 1982, 1-68, Springer-Verlag.

(84.8): W.T. Carnall and H.M. Crosswhite, 1984, A.N.L. report - 84-90.

(87.7): J. Blaise, J.F. Wyart, B.A. Palmer, R. Engleman Jr. and F. Launay, 1987, 19th Conf. Europ. Group Atomic Spectrosc., Dublin, Eire, Europhys. Conf. Abstr., 1987, 11E, Comm. A3-08.

(unp.12): J.G. Conway.