D. Sivakumar,  Role of Lemna minor Lin. in Treating the  Textile Industry Wastewater.   journal   = {International Journal of Materials and Textile Engineering }, [online]. World Academy of Science, Engineering and Technology.
    March 2014, vol. 87(3). 208 - 212
    [viewed 12 December 2019]. Available from: https://publications.waset.org/pdf/9997856.