Mohamed A. Shanan and  Ashraf H. El-Zanaty and  Kamal G. Metwally,  Effect of Concrete Strength and Aspect Ratio on Strength and Ductility of Concrete Columns.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2016, vol. 115(7). 955 - 963
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/10005175.