Ramon, Diego J.; Yus, Miguel
Tetrahedron, 1996 , vol. 52, # 43 p. 13739 - 13750

Fletcher,A.S. et al.
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1977 , p. 1881 - 1883

Rautenstrauch,V.; Joyeux,M.
Angewandte Chemie, 1979 , vol. 91, p. 72 - 73