L. Hildingsson, G. Kalghatgi, N. Tait, B. Johansson, and A. Harrison, “Fuel Octane Effects in the Partially Premixed Combustion Regime in Compression Ignition Engines,” SAE Technical Paper, 2009-01- 2648, 2009.
 C. Noehre, M. Andersson, B. Johansson, and A. Hultqvist, “Characterization of Partially Premixed Combustion,” SAE Technical Paper, 2006-01-3412, 2006. [OpenAIRE]
 M. Lewander, et al., “Investigation of the Combustion Characteristics with Focus on Partially Premixed Combustion in a Heavy Duty Engine,” SAE Int. J. Fuels Lubr., Vol. 1 (1), pp. 1063-1074, 2009.
 L. Yin, et al., “Sensitivity Analysis of Partially Premixed Combustion (PPC) for Control Purposes,” SAE Technical Paper, 2015-01-0884, 2015.
 H. Solaka, U. Aronsson, M. Tuner, and B. Johansson, “Investigation of Partially Premixed Combustion Characteristics in Low Load Range with Regards to Fuel Octane Number in a Light-Duty Diesel Engine,” SAE Technical Paper, 2012-01-0684, 2012.
 M. Founti, et al., “An Experimental Investigation on the Effect of Diluent Addition on Flame Characteristics in a Single Cylinder Optical Diesel Engine,” SAE Technical Paper, 2015-24-2438, 2015. [OpenAIRE]
 S. Tanov, R. Collin, B. Johansson, and M. Tuner, “Combustion Stratification with Partially Premixed Combustion, PPC, using NVO and Split Injection in a LD - Diesel Engine,” SAE Int. J. Engines, vol. 7 (4), pp. 1911-1919, 2014.
 R.P.C. Zegers, et al., “Correlating Flame Location and Ignition Delay in Partially Premixed Combustion,” SAE Technical Paper, 2012-01-1579, 2012.
 Z. Li, et al., “Comparison of the Lift-Off Lengths Obtained by Simultaneous OH-LIF and OH* Chemiluminescence Imaging in an Optical Heavy-Duty Diesel Engine,” SAE Technical Paper, 2015-24-2418, 2015.
 M. Izadi Najafabadi, N. Dam, B. Somers, and B. Johansson, “Ignition Sensitivity Study of Partially Premixed Combustion by Using Shadowgraphy and OH* Chemiluminescence Methods,” SAE Technical Paper, 2016-01-0761, 2016.
 S. Kokjohn, R. Reitz, D. Splitter, and M. Musculus, “Investigation of Fuel Reactivity Stratification for Controlling PCI Heat-Release Rates Using High-Speed Chemiluminescence Imaging and Fuel Tracer Fluorescence,” SAE Int. J. Engines, vol. 5(2), pp. 248-269, 2012.
 F. Bowditch, “A New Tool for Combustion Research A Quartz Piston Engine,” SAE Technical Paper, 610002, 1961. [OpenAIRE]
 M. Seul, L. O'Gorman, M. J. Sammon, “Practical Algorithms for Image Analysis,” Cambrigde University Press, Cambridge, U.K., 2000.