Hutabarat, Niko Andreas, Winfronstein Naibaho, and Saloom Hilton Siahaan. “Performance Analysis of Automatic Grass Chopper and Grass Vacuuming Machine With Gasoline Engine Drive System”. EDUCTUM: Journal Research 5, no. 2 (April 30, 2026): 294–301. Accessed May 25, 2026. https://jurnal.larisma.or.id/index.php/EJR/article/view/1625.