Suleyman A. Muyibi and  Munirat and  A. Idris and  Saedi Jami and  Parveen Jamal and  Mohd Ismail Abdul Karim,  Statistical Optimization of Process Conditions for Disinfection of Water Using Defatted Moringa oleifera Seed Extract.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2013, vol. 81(9). 628 - 633
    [viewed 18 February 2020]. Available from: https://publications.waset.org/pdf/16731.