WASET
    K. Soya and  N. Mihara and  D. Kuchar and  M. Kubota and  H. Matsuda and  T. Fukuta,  Selective Sulfidation of Copper, Zinc and Nickelin Plating Wastewater using Calcium Sulfide.   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2008, vol. 20(8). 182 - 186
    [viewed 08 May 2024]. Available from: https://publications.waset.org/pdf/3650.