Santoso, Agoes, Muhammad Badrus Zaman, and Arrijal Yudha Prawira. “Techno-Economic Analysis of Rotor Flettner in Container Ship 4000DWT”. International Journal of Marine Engineering Innovation and Research 1, no. 3 (July 10, 2025): 189–195. Accessed January 27, 2026. https://journal.its.ac.id/index.php/ijmeir/article/view/6207.