Kiurski S. Jelena and  Oros B. Ivana and  Kecić S. Vesna and  Kovačević M. Ilija and  Aksentijević M. Snežana,  The Statistical Significant of Adsorbents for Effective Zn (II) Ions Removal.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2014, vol. 91(7). 486 - 488
    [viewed 17 October 2019]. Available from: https://publications.waset.org/pdf/9998753.