1. E. A. Efimov and I. G. Erusalimchik, Electrochemistry of Germanium and Silicon [in Russian], Goskhimizdat, Moscow (1963).
2. G. Reddy and F. Grows, Brit. Pat. No. 711067, June 23, 1954.
3. I. L. Andrieux and M. I. Barbier-Andrieux, ?Preparation of germanium by fusion electrolysis,? C. R. Acad. Sci.,240, 2104?2106 (1955).
4. R. V. Chernov, V. M. Moshnenko, and N. N. Storchak, ?Electrolyte for the preparation of metallic silicon by electrolysis from melts,? Inventor's Certificate No. 460326, Oct. 21, 1974; Byul., No. 6 (1975).
5. K. M. Tressler and L. M. Dennis, ?Herstellung von geschmolzenen Germanium direkt aus Germaniumoxyd,? Chem. Zentralblatt, II,2, No. 18, 2273?2279 (1927); J. Phys. Chem.,31, 1429?1432 (1927).