Beatrice Abila and  Jussi Kantola,  Municipal Solid Waste Management Problems in Nigeria: Evolving Knowledge Management Solution.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2013, vol. 78(6). 303 - 308
    [viewed 19 October 2021]. Available from: https://publications.waset.org/pdf/4713.