A.R. Chun, S.H. Kim, M.S. Kim, C.G. Kim, S.J. Lee, T.W. Kwon, D.K. Park, S.J. Cho, J.G. Lee, S.H. Lee, Z.X. Guo and H.S. Woo
Synthetic Metals 158 ( 21-24 ): 876 - 878 , 2008