Hagos, F.Y. and Aziz, A.R.A. and Sulaiman, S.A. and Firmansyah and Mamat, R. (2017) Effect of fuel injection timing of hydrogen rich syngas augmented with methane in direct-injection spark-ignition engine. International Journal of Hydrogen Energy, 42 (37). pp. 23846-23855. ISSN 03603199