2U.S. Environmental Protection Agency. EPA 40 CFR 79 Control of Air Pollution From Motor Vehicles: Tier 3 Motor Vehicle Emission and Fuel Standards; Proposed Rule[S]. Washington: EPA, 2000:668-681.
5The United Nations Economic Commission for Europe. ECE R83-05 Uni- form Provisions Concerning The Approval of Vehicles With Regard to The Emission of Pollutants According to Engine Fuel Requirements[S]. Ger- many: UNECE, 2001: 24-62.
6U.S. Environmental Protection Agency. CFR Title 40 PART86 Control of Emissions From New and in-USE Highway Vehicles and Engines [S]. Washington: EPA, 2005: 168-184.