Jooho Hwang and  Chang-Kyu Song and  Chun-Hong Park,  An Evaluation Method for Two-Dimensional Position Errors and Assembly Errors of a Rotational Table on a 4 Axis Machine Tool.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2010, vol. 38(2). 185 - 188
    [viewed 12 April 2021]. Available from: https://publications.waset.org/pdf/6872.