1. H. Hulubei, Y. Cauchois, C.R. Séances, Acad. Sci. Ser. C 209, 39 (1939)
2. B.F. Thornton, S.C. Burdette, Bull. Hist. Chem. 35(2), 86 (2010)
3. P.F. Dittner, C.E. Bemis, D.C. Hensley, R.J. Silva, C.D. Goodman, Phys. Rev. Lett. 26, 1037 (1971)
4. K. Lassmann, C. O’Carroll, J. Laar, C.T. Walker, J. Nucl. Mater. 208, 201 (1994)
5. F. Wastin, C.T. Walker, A.D. Stalios, J. Rebizant, in Proceeding of Actinide 97, Baden-Baden, Germany, Sept 1997