Chambers, Richard D.; Sandford, Graham; Sparrowhawk, Matthew E.; Atherton, Malcolm J.
Journal of the Chemical Society - Perkin Transactions 1, 1996 , # 16 p. 1941 - 1944

Block,E.; Iyer,R.; Grisoni,S.
Journal of the American Chemical Society, 1988 , vol. 110, p. 7813

Patney, Harish K.
Tetrahedron Letters, 1994 , vol. 35, # 31 p. 5717 - 5718