Khiew, P. , Ho, M. , ThianKhoonTan, T. , Chiu, W. , Shamsudin, R. , Abd-Hamid, M. , Chia, C.. "Synthesis and Electrochemical Characterization of Iron Oxide / Activated Carbon Composite Electrode for Symmetrical Supercapacitor". World Academy of Science, Engineering and Technology, Open Science Index 80, International Journal of Materials and Metallurgical Engineering (2013), 7(8), 615 - 619.