Mikulina, M. O., Sarzhanov, B. O., & Polyvanyi, A. D. (2024). STUDY OF THE INFLUENCE OF THE RELIABILITY COEFFICIENT OF AGRICULTURAL MACHINERY ON THE DIRECT OPERATING COSTS OF AN AGRICULTURAL ENTERPRISE. Bulletin of Sumy National Agrarian University. The Series: Mechanization and Automation of Production Processes, (1 (55), 55-61. https://doi.org/10.32782/msnau.2024.1.7