Petukhova,N.P.; Prilezhaeva,E.N.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1968 , p. 2185 - 2187
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1968 , # 10 p. 2314 - 2317

Zheng, Tu-Cai; Burkart, Maureen; Richardson, David E.
Tetrahedron Letters, 1999 , vol. 40, # 4 p. 603 - 606