WASET
    Merve Ermis and  Murat Yılmaz and  Nihal Eratlı and  Mehmet H. Omurtag,  Static and Dynamic Analysis of Hyperboloidal Helix Having Thin Walled Open and Close Sections.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2016, vol. 117(9). 1149 - 1153
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10005343.