Ferhat Erdal and  Osman Tunca and  Serkan Tas and  Serdar Carbas,  Nonlinear Finite Element Analysis of Optimally Designed Steel Angelinaâ„¢ Beams.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2016, vol. 118(10). 1333 - 1342
    [viewed 12 December 2019]. Available from: https://publications.waset.org/pdf/10005629.