Ahmed Noor Al-Qayyim and  Barlas Ozden Caglayan,  Structural Damage Detection via Incomplete Modal Data Using Output Data Only.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2015, vol. 106(10). 1323 - 1326
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10002558.