CHEMISTRY OF MATERIALS, vol. 14, no. 10, page. 4281 - 4285, 2002-10
APPLIED CLAY SCIENCE, vol. 21, no. 5월 06, page. 287 - 293, 2002-08
APPLIED PHYSICS LETTERS, vol. 81, no. 3, page. 424 - 426, 2002-07-15