Sundara Subramanian Karuppasamy and  Che Hua Yang,  Laser Ultrasonic Imaging Based on Synthetic Aperture Focusing Technique Algorithm.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2021, vol. 169(1). 1 - 5
    [viewed 09 May 2024]. Available from: https://publications.waset.org/pdf/10011745.