Abdelrahman Elsehsah and  Hany Madkour and  Khalid Farah,  Three-Dimensional Numerical Investigation for Reinforced Concrete Slabs with Opening .   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2018, vol. 143(11). 1056 - 1067
    [viewed 09 December 2019]. Available from: https://publications.waset.org/pdf/10009736.