Steinmetz, Mark G.; Langston, Mark A.; Mayes, Richard T.; Udayakumar, B. S.
Journal of Organic Chemistry, 1986 , vol. 51, # 26 p. 5051 - 5063

Gusel'nikov, L.E.; Polyakov, Yu.P.; Volnina, E.A.; Ivanov, A.V.; Nametkin, N.S.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1984 , vol. 33, # 11 p. 2425 - 2426
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1984 , # 11 p. 2645 - 2646