[1] Kontarakis, G., Collings, N., Ma, T., 2000. Demonstration of HCCI Using a Single Cylinder Four-stroke SI Engine with Modified Valve Timing. SAE, Paper 2000-01-2870.

[2] Lü, X.C., Chen, W., Huang, Z., 2005. A fundamental study on the control of the HCCI combustion and emissions by fuel design concept combined with controllable EGR, Part 1: The basic characteristics of HCCI combustion. Fuel, 84(9):1074-1083.

[3] Noguchi, M., Tanaka, T., Takeuchi, Y., 1979. A Study Ongasoline Engine Combustion by Observation of Intermediate Reactive Products During Combustion. SAE, Paper 1979-01-0840.

[4] Onishi, S., Jo, S.H., Shoda, K., 1979. Actived Thermo-Atmosphere Combustion (ATAC)―A New Combustion Process for Internal Combustion Engines. SAE, Paper 1979-01-0501.

[5] Peng, Z.J., Zhao, H., Tom, M., Nicos, L., 2005. Characteristics of homogeneous charge compression ignition (HCCI) combustion and emissions of n-heptane. Combustion Science and Technology, 177(11):2113-2150.

[6] Santoso, H., Matthews, J., Cheng, W.K., 2005. Managing SI/HCCI Dual-Mode Engine Operation. SAE, Paper 2005-01-0162.

[7] Sjober, M., Dec, J., Cernansky, N.P., 2005. Potential of Thermal Stratification and Combustion Retard for Reducing Pressure-Rise Rates in HCCI Engines, Based on Multi-Zone Modeling and Experiments. SAE, Paper 2005-01-0113.

[8] Yang, J.L., Todd, C., Thomas, K., 2002. Development of a Gasoline Engine System Using HCCI Technology―The Concept and the Test Results. SAE, Paper 2002-01-2832.

[9] Yap, D., Karlovsky, J., Megaritis, A., Wyszynski, M.L., Xu, H., 2005. An investigation into propane homogeneous charge compression ignition (HCCI) engine operation with residual gas trapping. Fuel, 84(18):2372-2379.