Saliha Mohammed Belkebir, Benyoucef Khelidj, and Miloud Tahar Abbes. “Study of the Combustion Process of a Homogeneous Charge Compression Ignition (HCCI) Engine and a Partially Premixed Combustion (PPC) Mode of a Compression Ignition Engine Using Natural Gas As an Alternative Fuel”. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, vol. 84, no. 2, Mar. 2024, pp. 98-115, https://semarakilmu.com.my/journals/index.php/fluid_mechanics_thermal_sciences/article/view/7943.