Eui-Baek Byun, Nak-Yun Sung, Sun-Kyu Kwon, Beom-Seok Song, Jae-Hun Kim, Jong-il Choi, Han-Joon Hwang, Myung-Woo Byun and Ju-Woon Lee
Radiation Physics and Chemistry 78 ( 7 ): 429 - 431 , 2009