1. G. Hägg and N. Schonberg “‘β-Tungsten’ as a Tungsten Oxide,”Acta Crystallogr., 7, 351 (1954).
2. F.H. Ellinger, “Crystal Structure of Delta-Prime Plutonium and the Thermal Expansion Characteristics of Delta, Delta-Prime, and Epsilon Plutonium,”Trans. AIME, 206, 1256 (1956).
3. W.B. Pearson,A Handbook of Lattice Spacing and Structures of Metals and Alloys, Pergamon, London (1958).
4. R.T. Weiner and G.V. Raynor, “A Note on Transformation in Metallic Cerium,”J. Less-Common Met., 1, 309 (1959).
5. A.S. Coffinberry and W.N. Miner, Ed.,The Metal Plutonium, University of Chicago Press, Chicago (1961).