1. N. M. Alpatova and Yu. M. Kessler, Zh. Strukt. Khimii,5, 332 (1964).
2. I. R. Beattie, Quart. Rev.,17, 382 (1963).
3. V. Bazant, V. Chvalovsky, and J. Rathousky, Organosilicon Compounds, 3, Chapt. 4, Prague (1972).
4. M. G. Voronkov and I. P. Biryukov, Izv. Akad. Nauk LatvSSR, Ser. Khim., 170 (1968).
5. A. N. Egorochkin, Dissertation [in Russian], Gor'kii (1972);