1. Regulation (EU) No 253/2014 of the European Parliament and of the Council of 26 February 2014 amending Regulation (EU) No 510/2011 to define the modalities for reaching the 2020 target to reduce CO2 emissions from new light commercial.
2. Regulation (Ec) No 715/2007 Of the European Parliament and of the Council of 20 June 2007 on type approval 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.
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5. Cold start characteristics at low temperatures based on the first firing cycle in an Lpg engine;Liu;Energy Convers. Manage.,2007