Xiaoyong Gao, Hongliang Feng, Qinggeng Lin, Liwei Zhang, Xuwei Liu, Jiantao Zhao, Yufeng Liu, Yongsheng Chen, Jinhua Gu, Shie Yang, Weiqiang Li and Jingxiao Lu
Thin Solid Films 518 ( 15 ): 4473 - 4476 , 2010