Mustafa, N.S., N.H.A. Ngadiman, M.A. Abas, and M.Y. Noordin. 2020. “Application of Box-Behnken Analysis on the Optimisation of Air Intake System for a Naturally Aspirated Engine”. International Journal of Automotive and Mechanical Engineering 17 (2):8029-42. https://doi.org/10.15282/ijame.17.2.2020.21.0602.