WASET
    Seyed Sadegh Naseralavi and  Sadegh Balaghi and  Ehsan Khojastehfar,  On the Accuracy of Basic Modal Displacement Method Considering Various Earthquakes.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2016, vol. 115(7). 855 - 859
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10004887.