by Li, Yong-Le (永乐 李), Huang, An-Ping (安平 黄), Feng, Tang-Fu (唐福 冯), Chen, Qiang (强陈), Shu, Xiao-Lin (小林 舒), Chen, Jun-Yang (军养 陈), Chen, Zi-Yu (子瑜 陈)
Published in Chinese physics letters (01.06.2011)