Tamás Hartványi and  Ferenc Tóth,  Order Optimization of a Telecommunication Distribution Center through Service Lead Time.   journal   = {International Journal of Mechanical and Industrial Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2017, vol. 130(10). 1698 - 1703
    [viewed 24 May 2022]. Available from: https://publications.waset.org/pdf/10008099.