1. K. Nakamoto, T. Suzuki, S. Abe, et al., Eur. Pat. Appl. EP 0194693 A1, Sept. 17, 1986
2. Chem. Abstr., 111, 57300 (1989).
3. G. V. Kryshtal', G. M. Zhdankina, and E. P. Serebryakov, Izv. Akad. Nauk, Ser. Khim., No. 12, 2126 - 2129 (1993)
4. Russ. Chem. Bull., 42, 2039 (1993).
5. G. D. Gamalevich, A. V. Ignatenko, E. P. Serebryakov, et al., Izv. Akad. Nauk, Ser. Khim., No. 4, 761 - 766 (1995)