1. N. M. Kinysheva and L. A. Firsanova, Physico-Chemical Principles of Crystallization Processes Used in the Superpurification of Metals (V. N. Vigdorovich, ed.), pp. 108–112, JPRS 52552 (March 1971)
2. S. Bednarski, J. Cryst. Growth, 6: 193–194 (1970)
3. Roland Gerber and Jean-Louis Petit, Compt. Rend., 271B: 55–57 (1970)
4. P. Issi and A. Moureau, J. Less-Common Metals, 20: 67–69 (1970)
5. S. K. Sharma and O. P. Bahl, Thin Solid Films, 6: 239–248 (1970)