M. Arun and  A. Kannan,  Statistical Optimization of Adsorption of a Harmful Dye from Aqueous Solution.   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2016, vol. 112(4). 414 - 421
    [viewed 18 October 2019]. Available from: https://publications.waset.org/pdf/10004156.