1. http://www.drawfolio.com/en/portfolios/ramongarciagonzalez/picture/50212
2. Baines RG High performance exhaust pressure modulator valves. WABCO Automotive UK Limited, Morley, Leeds
3. Bennett S Medium/heavy duty truck engine, fuel & computerized management systems, 4th edn. ISBN-13: 978-1305578555, ISBN-10: 1305578554
4. Bennett S (2010) Modern diesel technology: diesel engines, Cengage learning, Delmar
5. Diesel Engine design for the 1990s, SP-1011 (940130), The fortieth L. Ray Buckandale Lecture, Society of Automotive Engineers, Inc. 400 commonwealth drive, Warrendale, PA-15096-0001, USA