1. Department of Motor Traffic Total vehicle population (2007-2014) & new registration (2007-2014) 2015 http://www.motortraffic.gov.lk/web/images/stories/document/po14.pdf
2. The National Environmental Act, no. 47 of 1980;Government of Sri Lanka;The Gazette of the Democratic Socialist Republic of Sri Lanka,2008
3. Gamalath , I Fernando , C Galgamuwa , U Perera , L Bandara , S Methodology to develop a driving cycle for a given mode and traffic corridor; case study for Galle Road, Colombo, Sri Lanka 2012 45 50
4. Comparison of fine particles emissions of light-duty gasoline vehicles from chassis dynamometer tests and on-road measurements;Li;Atmospheric Environment,2013
5. PM, NOx and butane emissions from on-road vehicle fleets in Hong Kong and their implications on emission control policy;Ning;Atmospheric Environment,2012