Basevich, V. Ya.; Kogarko, S. M. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1980 , vol. 29, p. 1050 - 1056 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1980 , vol. 29, p. 1503 - 1509