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2. Development of a Compression Ignition Heavy Duty Pilot-Ignited Natural Gas Fuelled Engine for Low NOx Emissions;Goudie;Society of Automotive Engineers,2004
3. Direct Injection of Natural Gas in a Heavy-Duty;Harrington;Socitety of Automotive Engineers,2002
4. NOx reduction from a heavy-duty diesel engine with direct injection of natural gas and cooled exhaust gas recirculation;McTaggart-Cowan;International Journal of Engine Research,2004
5. The effects of fuel dilution in a natural-gas direct-injection engine;McTaggart-Cowan;Journal of Automobile Engineering,2008