Beom-Seok Song, Jin-Gyu Park, Jae-Nam Park, In-Jun Han, Jong-il Choi, Jae-Hun Kim, Myung-Woo Byun, Sang-Wook Kang, Gi-Hyuk Choi and Ju-Woon Lee
Radiation Physics and Chemistry 78 ( 7 ): 671 - 674 , 2009