Gia Surguladze and  Lily Petriashvili and  Nino Topuria and  Giorgi Surguladze,  Modelling of Designing a Conceptual Schema for Multimodal Freight Transportation Information System.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2015, vol. 107(11). 2313 - 2316
    [viewed 23 September 2020]. Available from: https://publications.waset.org/pdf/10002711.