“Effects of Compressed Natural Gas (CNG) Injector Position on Intake Manifold towards Diesel-CNG Dual Fuel (DDF) Engine Performance”.
Jurnal Teknologi (Sciences & Engineering) 70, no. 1 (August 27, 2014). Accessed April 18, 2025.
https://journals.utm.my/jurnalteknologi/article/view/2292.