1. V. G. Zhiryakov and I. I. Levkoev, DAN, 120, 1035, 1958.
2. V. G. Zhiryakov, Khim. Nauka i Prom., 4, 680, 1959.
3. V. G. Zhiryakov and P. I. Abramenko, ZhVKhO, 5, 707, 1960.
4. P. I. Abramenko and V. G. Zhiryakov, KhGS, 227, 1965.
5. W. S. Emerson, F. W. Holly, and L. H, Klemm, J. Am. Chem. Soc., 63, 2561, 1941.