Hadi Barghlame and  M. A. Lotfollahi-Yaghin,  Investigating the Capacity of Ultimate Torsion of Concrete Prismatic Beams with Transverse Spiral Bars.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2011, vol. 59(11). 561 - 566
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/11485.