Meliyev Xudoyor Oblayorovich, and Tursunov Dilshod Mukhamadbekovich. “Analysis of the Impact of Hydraulic System Fluid Quality on the Efficient Operation of Universal-Type Tractors”. Eurasian Research Bulletin, vol. 6, Mar. 2022, pp. 103-8, https://geniusjournals.org/index.php/erb/article/view/914.