Dong-Chul Lee and  Byung-Kwan Oh and  Se-Woon Choi and  Hyo-Sun Park,  Multi-Objective Optimization for Performance-based Seismic Retrofit using Connection Upgrade.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2011, vol. 59(11). 555 - 560
    [viewed 22 May 2022]. Available from: https://publications.waset.org/pdf/7641.