Sung-Lye Shim, In-Min Hwang, Keun-Young Ryu, Min-Seok Jung, Hye-young Seo, Hee-Yeon Kim, Hyun-Pa Song, Jae-Hun Kim, Ju-Woon Lee, Myung-Woo Byun, Joong-Ho Kwon and Kyong-Su Kim
Radiation Physics and Chemistry 78 ( 7 ): 665 - 669 , 2009