1. G. Jangg, R. Kieffer, E. Prem, and E. Heidler, Werks. Korros.,20, 98?102 (1969).
2. G. Jangg, R. Kieffer, and H. Kogler, Werkst. Korros.,21, 699?703 (1970).
3. R. Kiffer and F. Benezovskii, Solid Materials [in Russian], Moscow (1968).
4. E. A. Efimov and I. G. Erusalimchik, Electrochemistry of Germanium and Silicon [In Russian], Moscow (1963).
5. N. D. Tomashov, T. V. Chukalovskaya, and G. P. Chernova, Zashch. Met., No. 5, 547?552 (1972).