WASET
    Kai Jin and  Hyder Abdul-Razzak and  Yousri Elkassabgi and  Hong Zhou and  Aaron Herrera,  Integrating the Theory of Constraints and Six Sigma in Manufacturing Process Improvement.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2009, vol. 25(1). 85 - 89
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/9955.