Benneche, Tore; Undheim, Kjell
Acta Chemica Scandinavica, Series B: Organic Chemistry and Biochemistry, 1982 , vol. 36, # 6 p. 409 - 410

Colin, J. L.; Loubinoux, B.
Tetrahedron Letters, 1982 , vol. 23, # 41 p. 4245 - 4246