JOURNAL OF THE KOREAN PHYSICAL SOCIETY, vol. 38, no. 1, page. 14 - 18, 2001-01
OTOLARYNGOLOGY-HEAD AND NECK SURGERY, vol. 137, no. 6, page. 925 - 930, 2007-12
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, vol. 485, no. 3, page. 458 - 467, 2002-06-11