Lester R. Morss, Norman M. Edelstein, J. Fuger (Hrsg.): . Bände 1-6. Springer, Dordrecht 2010, ISBN978-94-007-0211-0, S. 201 (English, [1] in Google Books).
doi.org
Brown D., Hall T.L., Moseley P.T (1973). "Structural parameters and unit cell dimensions for the tetragonal actinide tetrachlorides(Th, Pa, U, and Np) and tetrabromides (Th and Pa)". J. Chem. Soc., Dalton Trans. (6): 686–691. doi:10.1039/DT9730000686.{{cite journal}}: CS1 maint: multiple names: authors list (link)
