Gorbiychuk, M., Pashkovskyi, B., Moyseenko, O. and Sabat, N. 2017. Solution of the optimization problem on the control over operation of gas pumping units under fuzzy conditions. Eastern-European Journal of Enterprise Technologies. 5, 2 (89) (Oct. 2017), 65–71. DOI:https://doi.org/10.15587/1729-4061.2017.111349.