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2. B. M. Mikhailov, The Chemistry of Boron Hydrides [in Russian], Nauka, Moscow (1967), p. 442.
3. R. Grimes, Carboranes, Academic Press (1970).
4. V. V. Korshak, V. A. Zamyatina, and N. I. Bekasova, Organoboron Polymers [in Russian], Khimiya, Moscow (1975), pp. 61, 83.
5. L. I. Zakharkin, G. G. Zhigareva, V. S. Kirillova, N. S. Tolmacheva, and K. S. Raevskii, Khim.-farm. Zh., No. 1, 57 (1976).