WASET
    M. S. Ahmed and  F. A. Mohammad,  Theoretical Modal Analysis of Freely and Simply Supported RC Slabs.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2014, vol. 96(12). 2064 - 2068
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10000108.