оглы Габибов, И. А., and Н. С. оглы Сеидахмедов. “Motion Equations of Plates of Direct-Flow Valves for Reciprocating Compressors, Working in the Gas-Lift Oil Well Operation System”. Eastern-European Journal of Enterprise Technologies, vol. 4, no. 7(76), Aug. 2015, pp. 34-38, doi:10.15587/1729-4061.2015.48234.