Joseph C. Chen,  Optimizing Machine Vision System Setup Accuracy by Six-Sigma DMAIC Approach.   journal   = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2017, vol. 126(6). 1175 - 1184
    [viewed 28 February 2021]. Available from: https://publications.waset.org/pdf/10007194.