Lamia Hammadi and  Abdellah Ait Ouhman and  Aomar Ibourk,  Risk Management and Security Practice in Customs Supply Chain: Application of Cross ABC Method to the Moroccan Customs.   journal   = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2014, vol. 89(5). 1586 - 1596
    [viewed 24 October 2019]. Available from: https://publications.waset.org/pdf/9998604.