Gusel'nikov, L. E.; Volnina, E. A.; Al-Yahya, A.; Volkova, V. V. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1986 , vol. 35, # 11 p. 2424 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1986 , # 11 p. 2640