Kirchanov, A. A.; Zanina, A. S.; Kotlyarevskii, I. L. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1981 , vol. 30, # 8 p. 1579 - 1580 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1981 , vol. 30, # 8 p. 1914 - 1915