1. Tangri, K., Chaudhuri, D.K.: Govt. of India, A.E.C. Rept. A.E.E.T./Met./2 (1964).
2. Anagnostidis, M., Colombié, M., Monti, H.: J. Nucl. Mater. 11 (1964) 67.
3. Wilhelm, H.A., Carlson, O.N., Dickinson, J.M.: J. Metals 6 (1954) 915.
4. Krimer, B.I.: Zh. Neorgan. Khim. 3 (1958) 895.
5. Vold, C.L.: Rept. NRL (Naval Res. Lab. U.S.) Progr., October 1960, 28.