K. Schmidt and  Z. Miodrag and  C. Geiger,  Development of a Performance Measurement System for Forwarders.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2009, vol. 30(6). 923 - 928
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/9956.