Tetrahedron Letters, , vol. 40, # 33 p. 6025 - 6027

Vasil'ev, A. A.
Russian Journal of Organic Chemistry, 1994 , vol. 30, # 6.1 p. 876 - 880
Zhurnal Organicheskoi Khimii, 1994 , vol. 30, # 6 p. 822 - 826

Tetrahedron Letters, , vol. 40, # 33 p. 6025 - 6027