Volker Lange and  Stephanie Moede and  Christiane Auffermann,  Classification System for a Collaborative Urban Retail Logistics.   journal   = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2013, vol. 81(9). 1784 - 1788
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/16617.