M.S. Cho, S.Y. Kim, J.D. Nam and Y. Lee
Synthetic Metals 158 ( 21-24 ): 865 - 869 , 2008
M.S. Cho, Y.Y. Yun, J.D. Nam, Y. Son and Y. Lee
Synthetic Metals 158 ( 21-24 ): 1043 - 1046 , 2008