WASET
    Faraj El Dabee and  Romeo Marian and  Yousef Amer,  A Novel Model for Simultaneously Minimising Costs and Risks in Just-in-Time Systems Using Multi-Backup Suppliers: Part 2- Results.   journal   = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2013, vol. 74(2). 346 - 353
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/9997803.