Mazerolles, P.; Khabashesku, V. N.; Bogdanov, S. E.; Nefedov, O. M. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1989 , vol. 38, # 6.2 p. 1308 - 1312 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1989 , # 6 p. 1428 - 1432