Nedugov, A. N.; Pavlova, N. N.; Lapkin, I. I.
Journal of Organic Chemistry USSR (English Translation), 1991 , vol. 27, # 10 p. 1829 - 1832
Zhurnal Organicheskoi Khimii, 1991 , vol. 27, # 10 p. 2068 - 2071

Krief, Alain; Nazih, Abdesslame; Hobe, Myriam
Tetrahedron Letters, 1995 , vol. 36, # 44 p. 8111 - 8114