Khalid Kaddoura and  Tarek Zayed,  Quality Function Deployment Application in Sewer Pipeline Assessment .   journal   = {International Journal of Urban and Civil Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2018, vol. 135(3). 271 - 275
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10008662.