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APPLIED PHYSICS LETTERS, vol. 93, no. 14, 2008-10-06
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A, vol. 26, no. 5, page. 1166 - 1171, 2008-09
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, vol. 53, no. 2, page. 949 - 952, 2008-08
SURFACE SCIENCE, vol. 602, no. 13, page. L69 - L73, 2008-07-01