1. Engeljehringer, K.: AVL Emission Testing Handbook 2016 V1.0 PA3088E: www.avl.com/emission-testing-handbook (2016)
2. Control of Air pollution from New Motor Vehicles – Certification and Test Procedures. Code of Federal Regulations 40 CFR 86.110-94
3. Richtlinie 91/441/EWG vom 26.06.1991 (1991)
4. TRIAS 60–2003, Exhaust Emission Test Procedures for Light and Medium-Duty Motor Vehicles. In: Blue Book. Automobile Type Approval Handbook for Japanese Certification. JASIC 2004 (2004)
5. Code of Federal Regulations: Control of Emissions from new and In-Use Highway Vehicles and Engines. 40 CFR 86.007-11