Lutsenko, Igor, Olena Fomovskaya, Olga Serdiuk, Mila Baranovskaya, and Volodymyr Fomovskyi. 2018. “Development of Test Operations of Different Duration in Terms of Input for the Verification of Efficiency Formula”. Eastern-European Journal of Enterprise Technologies 5 (4 (95):14-21. https://doi.org/10.15587/1729-4061.2018.142212.