TY - Chin. Phys. Lett. A1 - XU Shi-Xiang T1 - Withdrawal of Chinese Physics Letters 26 (2009) 114209 Y1 - 2011-05-29 JF - Chinese Physics Letters JO - Chin. Phys. Lett. SP - 069901EP - 069901 VL - 28 IS - 6 UR - https://cpl.iphy.ac.cn N1 - 10.1088/0256-307X/28/6/069901 ER -