1. The efficacy of low emission zones in central London as a means of reducing nitrogen dioxide concentrations;Carslaw;Transportation Research Part D: Transport and Environment,2002
2. Department of Environment (DOE), 2003a. 2003 Environmental White Paper in Busan Metropolitan City, http://www.busan.go.kr/metro/busanlife/life/environment/green23/2bu/2bu_02_02_03.htm
3. Department of Environment (DOE), 2003b. 2003 Environmental White Paper in Busan Metropolitan City, http://www.busan.go.kr/metro/busanlife/life/environment/green23/2bu/2bu_02_01_01.htm
4. Photochemical ozone formation in north west Europe and its control;Derwent;Atmospheric Environment,2003
5. EMC (Environment Management Corporation), 2002. Strategies for clean the World Cup. Environmental News Spring. http://emc.or.kr/information2002/spring/sp_news.htm.