A. Arafi, R. Ulhaq, A. Khaleil Akmal, and F. O. Widarta, “IDENTIFICATION OF THRESHER MAINTENANCE MECHANISMS IN A PALM OIL PROCESSING PLANT AT PT. BEURATA SUBUR PERSADA (BSP), NAGAN RAYA”, SP, vol. 2, no. 1, pp. 30–34, Apr. 2026.