Emin Z. Mahmud,  The Influence of Strengthening on the Fundamental Frequency and Stiffness of a Confined Masonry Wall with an Opening for а Door.   journal   = {International Journal of Structural and Construction Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2020, vol. 166(10). 305 - 311
    [viewed 09 May 2024]. Available from: https://publications.waset.org/pdf/10011482.