Yew Heng Teoh, Heoy Geok How, Kok Hwa Yu, Hun Guan Chuah, and Wai Loon Yin, “Influence of Octane Number Rating on Performance, Emission and Combustion Characteristics in Spark Ignition Engine”, J. Adv. Res. Fluid Mech. Therm. Sc., vol. 45, no. 1, pp. 22–34, May 2018.