1. US
Congress, Clean Air Act. 42 USC #7401 1970.
2. Commission
Regulation (EC) No 692/2008 of July 2008 implementing and amending
Regulation (EC) No 715/2007 of the European Parliament and of the
Council on type-aproval of motor vehicles with respect to emissions
from light passenger and commercial vehicles (Euro 5 and Euro 6) and
on access to vehicle repair and maintenance information. OJ
L 199/1 2008, https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32008R0692&from=EN.
3. Commission
Regulation (EU) No 459/2012 of 29 May 2012 amending Regulation (EC)
No 715/2007 of the European Parliament and of the Council and Commission
Regulation (EC) No 692/2008 as regards emissions from light passenger
and commercial vehicles (Euro 6). OJ L 142/16–24 2012, https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32012R0459&from=EN.
4. Salvat, O.; Marez, P.; Belot, G. Passenger Car Serial Application of a Particulate Filter System on a Common Rail Direct Injection Diesel Engine. In SAE International: 2000.
5. PGM Market Report 2017; Johnson Matthey
PLC; 2017, http://www.platinum.matthey.com/documents/new-item/pgm%20market%20reports/pgm_market_report_may_2017.pdf.