Osama Elgadi and  Martin Birkett and  Wai Ming Cheung,  Identifying the Barriers behind the Lack of Six Sigma Use in Libyan Manufacturing Companies.   journal   = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2016, vol. 113(5). 910 - 914
    [viewed 22 September 2024]. Available from: https://publications.waset.org/pdf/10004452.