B. Guezzen and  M.A. Didi and  B. Medjahed,  Optimization of Process Parameters using Response Surface Methodology for the Removal of Zinc(II) by Solvent Extraction .   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2017, vol. 122(2). 126 - 129
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/10006195.