by Liang, De-Chun (德春 梁), An, Qi (琪安), Jin, Peng (鹏金), Li, Xin-Kun (新坤 李), Wei, Heng (恒魏), Wu, Ju (巨吴), Wang, Zhan-Guo (占国 王)
Published in Chinese physics B (01.10.2011)