WASET
    M. S. Ahmed and  F. A. Mohammad,  Experimental Modal Analysis of Reinforced Concrete Square Slabs.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2015, vol. 99(3). 448 - 452
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10000653.