Heywood, J.B., "Internal Combustion Engine Fundamentals", McGraw-Hill, Vol. 1, pp. 117-125, New York, (1988).
 Pulkrabek, W. W., "Engineering Fundamentals of the Internal Combustion Engine", Printice Hall, Vol. 1, pp. 149-254, (2000).
 Lata, D. B., and Misra, A., "Analysis of Ignition Delay Period of a Dual Fuel Diesel Engine with Hydrogen and LPG as Secondary Fuels", International Journal of Hydrogen Energy, Vol. 36, No. 5, pp. 3746-3756, (2011).
 Stone, R., "Introduction to Internal Combustion Engines", Macmillan Press Ltd, Vol. 3, pp. 252-272, (1999).
 Karim, J. W., and Raine, R., "An Examination of the Ignition Delay Period in Dual Fuel Engines", In: SAE Technical Paper, No. 892140, Vol. 3, pp. 331-340, (1989).
 Tamour, E. F., Javeda, N., Ahfaz Ahmeda, Jihad Badrab, Khalil Djebbia, Mohamed Beshira, Weiqi Jia,c, S. Mani Sarathya and Aamir Farooq, "Ignition Delay Measurements of Light Naphtha: A Fully Blended Low Octane Fuel", Proceedings of the Combustion Institute, Vol. 1, pp. 1-8, (2016).
 Karim, G.A., and Raine, R.R., "An Examination of the Ignition Delay Period in Dual Fuel Engines", SAE Technical Paper, Vol. 5 , pp. 20-27, (1989).
 Weaver, C. S., "Natural Gas Vehicle - A Review of the State of the Art, Society of Automotive Engineers", SAE Paper, No. 892133, Vol. 7, pp. 52-57, (1989).
 Thiagarajan, S., "Investigation of Fuel Composition Effects on a Natural Gas Fuelled Spark-ignited Engine", Natural Gas and Alternative Fuels for Engines, American Society of Mechanical Engineers, Vol. 24, pp. 62-71, (1994).
 Neilson, Q. B., and Sorenson, S., "Ignition Delay in the Dual Fuel Engine", SAE Technical Paper, No. 870589, Vol. 24, pp. 153-168, (1987).
 Abagnale, C., Cameretti, M., Simio, L. De., Gambino, M., Iannaccone, S., and Tuccillo, R., "Numerical Simulation and Experimental Test of Dual Fuel Operated Diesel Engines", Applied Thermal Engineering, Vol. 65, No. 1–2, pp. 403-417, (2014).
 Zhang, F., Liu, H. F., Yu, J., and Yao, M., "Direct Numerical Simulation of N-Heptane/Air Auto-ignition with Thermal and Charge Stratifications under Partially-premixed Charge Compression Ignition (PCCI) Engine Related Conditions", Applied Thermal Engineering, Vol. 104, pp. 516-526, (2016).
 Najafi, B., "Simulation of Effect of Cetane, Density and Gravity of Bio Diesel in Ignition Delay in Diesel Engine", Engine Investigations, Vol. 16, pp. 13-21, (2010).
 Ferguson, K., "Internal Combustion Engines Applied Thermosciences", New York: John Wiley &Sons Inc, Vol. 2, pp. 120-145, (2001).
 Gunea, R. R. C., and Karim, G.A., "The Effects of Pilot Fuel Quality on Dual Fuel Engine Ignition Delay", In: SAE Technical Paper 982453, Vol. 17, pp. 77-81, (1998).
 Lata, D. B., Misra, A., and Medhekar, S., "Investigations on the Combustion Parameters of a Dual Fuel Diesel Engine with Hydrogen and LPG as Secondary Fuels", International Journal of Hydrogen Energy, Vol. 36, No. 21, pp. 13808-13819, (2011).
 Javed, T., Lee, C., AlAbbad, M., Djebbi, K., Beshir, M., Badra, J., Curran, H., and Farooq, A., "Ignition Studies of N-Heptane/Iso-Octane/Toluene Blends", Combustion and Flame, Vol. 171, pp. 223-233, (2016).
 Huang, M., Gowdagiri, S., Cesari, X. M., and Oehlschlaeger, M. A., "Diesel Engine CFD Simulations: Influence of Fuel Variability on Ignition Delay", Fuel, Vol. 181, pp. 170-177, (2016).
 Dhole, A. E., Yarasu, R. B., and Lata D. B., "Investigations on the Combustion Duration and Ignition Delay Period of a Dual Fuel Diesel Engine with Hydrogen and Producer Gas as Secondary Fuels", Applied Thermal Engineering, Vol. 107, pp. 524-532, (2016).
 Tarabet, L., Loubar, K., Lounici, M. S., Khiari, K., Belmrabet, T., and Tazerout, M., "Experimental Investigation of DI Diesel Engine Operating with Eucalyptus Biodiesel/Natural Gas under Dual Fuel Mode", Fuel, Vol. 133, pp. 129-138, (2014).
 Hardenberg, H. F. HO., "An Empirical Formula for Computing the Pressure Rise Delay of a Fuel from its Cetane Number and from the Relevant Parameters of Direct-injection Diesel Engines", In: SAE Technical Paper 790493, Vol. 78, pp. 1823- 1834, (1979).
 Prakash, G., Ramesh, A., Shaik, A.B., "An Approach for Estimation of Ignition Delay in a Dual Fuel Engine", No. 1999-01-0232. SAE Technical Paper, (1999).