WASET
Kuchar, D. , Fukuta, T. , Kubota, M. , Matsuda, H.. "Recovery of Cu, Zn, Ni and Cr from Plating Sludge by Combined Sulfidation and Oxidation Treatment". World Academy of Science, Engineering and Technology, Open Science Index 20, International Journal of Chemical and Molecular Engineering (2008), 2(8), 165 - 169.