TETRAHEDRON LETTERS, vol. 36, no. 19, page. 3361 - 3364, 1995-05-08
SYNLETT, no. 3, page. 197 - 198, 1994-03
TETRAHEDRON LETTERS, vol. 34, no. 52, page. 8465 - 8468, 1993-12-24
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 115, no. 16, page. 7472 - 7477, 1993-08-11
TETRAHEDRON LETTERS, vol. 33, no. 45, page. 6811 - 6814, 1992-11-03