Bolestova, G. I.; Parnes, Z. N.; Kursanov, D. N. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1981 , vol. 30, # 12 p. 2370 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1981 , # 12 p. 2839