TETRAHEDRON LETTERS, vol. 51, no. 42, page. 5581 - 5584, 2010-10-20
TETRAHEDRON LETTERS, vol. 51, no. 27, page. 3536 - 3537, 2010-07-07
BULLETIN OF THE KOREAN CHEMICAL SOCIETY, vol. 31, no. 5, page. 1368 - 1370, 2010-05-20