Vazquez, M. Eugenio; Rothman, Deborah M.; Imperiali, Barbara
Organic and Biomolecular Chemistry, 2004 , vol. 2, # 14 p. 1965 - 1966

Rusin, B. A.; Leksin, A. N.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1982 , vol. 31, # 12 p. 2375 - 2380
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1982 , # 12 p. 2685 - 2962