Amir Ridhuan, Shahrul Azmir Osman, Mas Fawzi, Ahmad Jais Alimin, and Saliza Azlina Osman, “A Review of Comparative Study on The Effect of Hydroxyl Gas in Internal Combustion Engine (ICE) On Engine Performance and Exhaust Emission”, J. Adv. Res. Fluid Mech. Therm. Sc., vol. 87, no. 2, pp. 1–16, Mar. 2024.