Zhao, H., Psanis, C. and Ma, T. (2011) 'Analysis of an air hybrid engine concept with an energy recovery valve'. International Journal of Vehicle Design, 55 (1). pp. 49 - 75. ISSN: 0143-3369

Zhao, H., Psanis, C., Ma, T., Turner, J. and Pearson, R. (2011) 'Theoretical and experimental studies of air-hybrid engine operation with fully variable valve actuation'. International Journal of Engine Research, 12 (6). pp. 527 - 548. ISSN: 1468-0874

Lee, CY., Zhao, H. and Ma, T. (2010) 'A low cost air hybrid concept'. Oil and Gas Science and Technology - Revue d'IFP Energies Nouvelles, 65 (1). pp. 19 - 26. ISSN: 1294-4475 Open Access Link

Leach, B., Zhao, H., Li, Y. and Ma, T. (2007) 'Two-phase, fuel distribution measurements in a gasoline direct injection engine with an air-assisted injector using advanced optical diagnostics'. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 221 (6). pp. 663 - 673. ISSN: 0954-4070

Li, Y., Zhao, H. and Ma, T. (2006) 'Stratification of fuel for better engine performance'. Fuel, 85 (4). pp. 465 - 473. ISSN: 0016-2361

Peng, Z., Zhao, H., Ma, T. and Ladommatos, N. (2005) 'Characteristics of homogeneous charge compression ignition (HCCI) combustion and emissions of n-heptane'. Combustion Science and Technology, 177 (11). pp. 2113 - 2150. ISSN: 0010-2202 Open Access Link

Li, Y., Zhao, H. and Ma, T. (2005) 'Flow and mixture optimization for a fuel stratification engine using PIV and PLIF techniques'.2nd International Conference on Optical and Laser Diagnostics. London, UK. 11 - 14 September. IOP Publishing. pp. 59 - 68. ISSN: 1742-6588

Li, Y., Zhao, H., Leach, B. and Ma, T. (2005) 'Development of a fuel stratification spark ignition engine'. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 219 (7). pp. 923 - 934. ISSN: 0954-4070

Man, KY., Zhao, H., Ma, T. and Oakley, AJ. (2004) 'Effect of fuel properties on CAI/HCCI combustion and emission in a 4-stroke gasoline engine'.International Conference on Which Fuels for Low CO2 Engines?. Rueil Malmaison, France. 22 - 23 September. EDITIONS TECHNIP. pp. 69 - 78.

Li, Y., Zhao, H., Leach, B., Ma, T. and Ladommatos, N. (2004) 'Characterization of in-cylinder flow structure in a high-tumble spark ignition engine'. International Journal of Engine Research, 5 (5). pp. 375 - 400. ISSN: 1468-0874

Leach, B., Zhao, H., Li, Y., Ma, T., Ladommatos, N., Law, D. and Houston, R. et al. (2002) 'Characterization of in-cylinder fuel distribution from an air-assisted fuel injection system using advanced laser diagnostics'.Conference on Fuel Injection Systems. London, UK. 26 - 27 November. PROFESSIONAL ENGINEERING PUBLISHING LTD. pp. 159 - 172. ISSN: 1356-1448

Zhao, H., Li, J., Ma, T. and Ladommatos, N. (2002) 'Performance and analysis of a 4-stroke multi-cylinder gasoline engine with CAI combustion'.SAE World Congress & Exhibition. Detroit, Michigan, USA. 23 SAE International. ISSN: 0148-7191 Open Access Link

Li, J., Zhao, H., Ladommatos, N. and Ma, T. (2001) 'Research and development of Controlled Auto-Ignition (CAI) combustion in a 4-stroke multi-cylinder gasoline engine'.SAE International Fall Fuels & Lubricants Meeting & Exhibition. San Antonio, Texas, USA. 24 SAE International. ISSN: 0148-7191 Open Access Link

Oakley, A., Zhao, H., Ma, T. and Ladommatos, N. (2001) 'Dilution effects on the controlled auto-ignition (CAI) combustion of hydrocarbon and alcohol fuels'.SAE International Fall Fuels & Lubricants Meeting & Exhibition. San Antonio, Texas, USA. 24 SAE International. ISSN: 0148-7191 Open Access Link

Oakley, A., Zhao, H., Ladommatos, N. and Ma, T. (2000) 'Experimental studies on Controlled Auto-ignition (CAI) combustion in a 4-stroke gasoline engine'.International Conference on 21st Century Emissions Technology. London, UK. 4 - 5 December. SAE International. pp. 163 - 174. ISSN: 0148-7191

Zhao, H., Williams, J., Damiano, L., Bryce, D., Ladommatos, N. and Ma, T. (2000) 'Development of a specially designed optical engine and laser diagnostics for stratified charge and controlled auto-ignition combustion studies'.International Conference on Computational and Experimental Methods in Reciprocating Engines. London, UK. 1 - 2 November. PROFESSIONAL ENGINEERING PUBLISHING LTD. pp. 151 - 165. ISSN: 1356-1448

Zhao, H., Peng, Z., Calnan, P., Ladommatos, N. and Ma, T. (1999) 'Analysis of stratified EGR and air on combustion and NO formation in a spark-ignition engine'. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 213 (6). pp. 611 - 623. ISSN: 0954-4070

Zhao, H., Calnan, P., Ladommatos, N. and Ma, T. (1999) 'Development of an engine simulation program and its application to stratified charge SI engines'. International Journal of Vehicle Design, 22 (3-4). pp. 159 - 194. ISSN: 0143-3369

Calnan, PCC., Zhao, H., Ladommatos, N. and Ma, T. (1998) 'Analysis of axial stratification on Sl engine performance and emissions'.International Conference on Combustion Engines and Hybrid Vehicles. London, UK. 28 - 30 April. PROFESSIONAL ENGINEERING PUBLISHING LTD. pp. 159 - 181. ISSN: 1356-1448

Meng, Q., Zhao, H., Ladommatos, N. and Ma, T. (1996) 'Modelling of in-cylinder flow and mixing processes in a stratified-charge spark ignition engine'.IMechE Seminar on Lean Burn Combustion Engines. London, UK. 3 - 4 December. MECHANICAL ENGINEERING PUBL. pp. 35 - 53. ISSN: 1357-9193