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”, prengpe, vol. 21, no. 5, pp. 14–16, Mar. 2023.