E. N. Fadhilla, Z. Monica, F. A. F. Adnan, J. S. Rhee, and D. Ginting, “Fuel Efficiency Evaluation of Automatic Motorcycles in Indonesia Using MATLAB-Based Clustering”, Int. J. Innov. Mech. Eng. Adv. Mater, vol. 7, no. 2, pp. 64–73, Apr. 2025.