WASET
    Lara F. Horani and  Shurong Tong,  Rating the Importance of Customer Requirements for Green Product Using Analytic Hierarchy Process Methodology.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2018, vol. 136(4). 558 - 564
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10009004.