1. http://www.volkswagen.co.uk/technology/petrol/tsi; 2017 [accessed 18 December 2017].
2. http://www.volkswagen.co.uk/technology/diesel/tdi, 2017 [accessed 18 December 2017].
3. http://media.daimler.com/marsMediaSite/en/instance/ko/The-technology-of-the-new-direct-injection-petrol-engine-from-Mercedes-Benz-Direct-injection-with-spray-guided-combustion-as-a-future-technology-for-the-spark-ignition-engine.xhtml?oid=9905308; 2017 [accessed 18 December 2017].
4. Mehdiyev R, Derbentli T, Arslan H, Kutlar OA, Ozcan E, Ogun K, Gurbuz T, Babaoglu O, Potur RA. Development of a turbo diesel engine by a new combustion process for heavy duty vehicles and tractors. No. 2009-24-0046. SAE Technical Paper, 2009.
5. The high speed internal combustion engine;Ricardo,1953