R. Nikolaev, T. Milkova, D. Zhelyazkova (2017). MINIMIZING THE TRANSPORTATION COSTS BY OPTIMAL POSITIONING OF UNITS IN LOGISTICS SYSTEMS. 4th International Multidisciplinary Scientific Conference on Social Sciences and Arts SGEM 2017, 509-516. https://doi.org/10.5593/sgemsocial2017/14/S04.067