Zhiguo Ren and  Lilong Cai,  Accurate Dimensional Measurement of 3D Round Holes Based on Stereo Vision.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    December 2009, vol. 36(12). 1608 - 1614
    [viewed 10 April 2021]. Available from: https://publications.waset.org/pdf/2552.