TETRAHEDRON LETTERS, vol. 33, no. 45, page. 6811 - 6814, 1992-11-03
SYNLETT, no. 3, page. 197 - 198, 1994-03
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS, vol. 4, no. 23, page. 2799 - 2804, 1994-12-08
BULLETIN OF THE KOREAN CHEMICAL SOCIETY, vol. 13, no. 3, page. 343 - 344, 1992-06-20
TETRAHEDRON LETTERS, vol. 34, no. 52, page. 8465 - 8468, 1993-12-24