JOURNAL OF THE KOREAN PHYSICAL SOCIETY, vol. 59, no. 2, page. 1681 - 1684, 2011-08-11
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, vol. 269, no. 2, page. 159 - 166, 2011-01-15
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, vol. 283, no. 2, page. 519 - 525, 2010-02