Winoko, Yuniarto Agus, and Angga Setiawan. “ffect of ocker rm ariation on the erfonmance of a ingle ylinder etrol ngine”. International Journal of Marine Engineering Innovation and Research 9, no. 3 (July 10, 2025): 568–573. ccessed December 7, 2025. https://journal.its.ac.id/index.php/ijmeir/article/view/4919.