MICROELECTRONICS JOURNAL, vol. 36, no. 3-6, page. 203 - 206, 2005-03
JOURNAL OF APPLIED PHYSICS, vol. 96, no. 8, page. 4122 - 4125, 2004-10-15
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, vol. 45, no. 1, page. 202 - 205, 2004-07
MICROELECTRONIC ENGINEERING, vol. 78-79, page. 229 - 232, 2005-03