M. N. Lawal, et al. “Differential Air Fresh Charge Demand, Supply and Utilisation in Two-Stroke Spark Ignition Engines”. International Journal of Automotive and Mechanical Engineering, vol. 14, no. 4, Dec. 2022, pp. 4769-84, https://doi.org/10.15282/ijame.14.4.2017.13.0374.