ADVANCED MATERIALS, vol. 16, no. 20, page. 1811 - 1814, 2004-10-18
TETRAHEDRON LETTERS, vol. 45, no. 37, page. 6835 - 6838, 2004-09-06
BULLETIN OF THE KOREAN CHEMICAL SOCIETY, vol. 25, no. 3, page. 420 - 422, 2004-03-20
TETRAHEDRON LETTERS, vol. 45, no. 4, page. 723 - 727, 2004-01-19