WASET
    Magdi M. E. Zumrawi,  Investigation of Failures in Wadi-Crossing Pipe Culverts, Sennar State, Sudan.   journal   = {International Journal of Structural and Construction Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2016, vol. 116(8). 1068 - 1074
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/10005370.