1. 1. A. Demirbas, "Progress and recent trends in biofuels," Prog. Energy Combust. Sci., vol. 33, no. 1, pp. 1– 18, 2007.
   2. H. Chen, J. Wang, S. Shuai, and W. Chen, "Study of oxygenated biomass fuel blends on a diesel engine," Fuel, vol. 87, no. 15–16, pp. 3462–3468, 2008.
   3. S. Kimura, O. Aoki, Y. Kitahara, and E. Aiyoshizawa, "Ultra-Clean Combustion Technology Combining a Low-Temperature and Premixed Combustion Concept for Meeting Future Emission Standards," 2001.
   4. N. Raeie, S. Emami, and O. Karimi Sadaghiyani, "Effects of injection timing, before and after top dead centre on the propulsion and power in a diesel engine," Propuls. Power Res., vol. 3, no. 2, pp. 59–67, 2014.
   5. A. S. Kuleshov, "Model for predicting air-fuel mixing, combustion and emissions in DI diesel engines over the whole operating range," 2005.
   6. C. D. Rakopoulos, D. C. Rakopoulos, D. T. Hountalas, E. G. Giakoumis, and E. C. Andritsakis, "Performance and emissions of bus engine using blends of diesel fuel with bio-diesel of sunflower or cottonseed oils derived from Greek feedstock," Fuel, vol. 87, no. 2, pp. 147– 157, 2008.
   7.  J. Jonathan Chaplin and R. Bin Rimfiel Bin Janus, "Ethanol Fumigation of a Compression-Ignition Engine Using Advanced Injection of Diesel Fuel," Trans. ASAE, vol. 30, no. 3, pp. 0610–0614, 1987.
   8.  C. C. D. Rakopoulos, G. N. G. Taklis, and E. E. I. Tzanos, "Analysis of combustion chamber insulation effects on the performance and exhaust emissions of a DI diesel engine using a multi-zone model," Heat Recover. Syst. CHP, vol. 15, no. 7, pp. 691–706, Oct. 1995.
   9.  N. Saravanan, G. Nagarajan, G. Sanjay, C. Dhanasekaran, and K. M. Kalaiselvan, "Combustion analysis on a DI diesel engine with hydrogen in dual fuel mode," Fuel, vol. 87, no. 17–18, pp. 3591–3599, 2008.
   10. K. P. Kumar and K. Yuvaraj, "Analysis of Performance and Emission Parameters on Diesel Engine Using Various Blended Bio-Fuels," vol. 5, no. 6, pp. 1319– 1324, 2016