WASET
    Jae-Young Choi and  Sung-Gaun Kim,  Dead-Reckoning Error Calibration using Celling Looking Vision Camera.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2012, vol. 62(2). 420 - 423
    [viewed 18 April 2024]. Available from: https://publications.waset.org/pdf/11899.