Balabaev O.T. Б. О., Akhmetsadyk O.E. А. О., Rakhimov A.B. Р. А., and Naviykhan B Н. Б. “Development of a Computer Program for Determining the Freight Charge in the Conditions of KARAGANDA TRANS-COAL LLP”. Рroblems of Engineering and Professional Education, vol. 21, no. 5, Mar. 2023, pp. 14-16, doi:10.32523/2220-685X-2013-21-5-14-16.