WASET
    Morteza Raki and  Abolghasem Zabihollah and  Omid Askari ,  The Cracks Propagation Monitoring of a Cantilever Beam Using Modal Analysis .   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2016, vol. 113(5). 970 - 975
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10004562.