Bahtiar Wilantara, H. Nur Kholis, E. Yuliantoko, H. Nasrullah, and T. Rizky Wijaya. “Vespa Motorcycle Modification Effects to Increase Power and Torque”. Jurnal E-Komtek (Elektro-Komputer-Teknik), Vol. 5, no. 2, Dec. 2021, pp. 277-83, doi:10.37339/e-komtek.v5i2.794.