WASET
    Ki-Tae Park and  Young-Joon Yu and  Chin-Hyung Lee and  Woosang Lee,  Development of 3D Coordinates and Damaged Point Detection System for Ducts using IMU.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2011, vol. 58(10). 510 - 515
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/7787.