NychayІ. М. (2023). SIMULATION OF LEVEL OF MACHINE UTILIZATION OF GRAIN HARVESTING COMBINERS BY NETWORK OF FUNCTIONAL MASS SERVICE CHAINS. Bulletin of Sumy National Agrarian University. The Series: Mechanization and Automation of Production Processes, (4 (50), 71-77. https://doi.org/10.32845/msnau.2022.4.11