References included in article:

Order of appearence	Full citation	SRCosmos Link
1	Morawska L, Bofinger ND, Kocis L, Nwankwoala A, (1998), ‘Submicrometer and Supermicrometer Particles from Diesel Vehicle Emissions’ Environmental Science and Technology, Vol. 32, pp. 2033-2042.
2	Chan LY, Lau WL, Lee SC, Chan CY, (2002), ‘Commuter Exposure to Particulate Matter in Public Transportation Modes in Hong Kong’ Atmospheric Environment, Vol. 36, pp. 3363-3373.
3	Chan LY, Lau WL, Zou SC, Cao ZX, Lai SC, (2002), ‘Exposure Level of Carbon Monoxide and Respirable Suspended Particulate in Public Transportation Modes while Commuting in Urban Area of Guangzhou, China’ Atmospheric Environment, Vol. 36, pp. 5831 - 5840.
4	Duci A, Chaloulakou A, Spyrellis N, (2003), ‘Exposure to Carbon Monoxide in the Athens Urban Area During Commuting’ The Science of the Total Environment, Vol. 309, pp. 47-58.
5	Gulliver J, Briggs DJ, (2004), ‘Personal Exposure to Particulate Air Pollution in Transport Microenvironments’ Atmospheric Environment, Vol. 38, pp. 1-8.
6	Van-Wijnen JH, Verhoeff AP, Jans HWA, Van-Bruggen M, (1995), ‘The Exposure of Cyclists, Car Drivers and Pedestrians to Traffic-Related Air Pollutants’ International Archives of Occupational and Environmental Health, Vol. 67, pp. 187-193.
7	Zhao L, Wang X, He Q, Wang H, Sheng G, Chan LY, Fu J, Blake DR, (2004), ‘Exposure to Hazardous Volatile Organic Compounds, PM10 and CO while Walking Along Streets in Urban Guangzhou, China’ Atmospheric Environment, Vol. 38, pp. 6177-6184.
8	Kaur S, Nieuwenhuijsen MJ, Colvile RN, (2005), ‘Personal Exposure of Street Canyon Intersection Users to PM2.5, Ultrafine Particle Counts and Carbon Monoxide in Central London, U.K.’ Atmospheric Environment, Vol. 39, pp. 3629-3641.
9	Michaels RA, Kleinman MT, (2000), ‘Incidence and Apparent Health Significance of Brief Airborne Particles Excursions’ Aerosol Science and Technology, Vol. 32, pp. 93-105.
10	Schwartz J, (2000), ‘Is There Harvesting in the Association of Airborne Particles with Daily Deaths and Hospital Admissions?’ Epidemiology, Vol. 12, pp. 55-61.
11	Wahlin P, Palmgren F, Van-Dingenen R, (2001), ‘Experimental Studies of Ultrafine Particles in Streets and the Relationship to Traffic’ Atmopsheric Environment,Vol. 35, Suppl. No. 1, S63-S69.
12	Weijers EP, Khlystov AY, Kos GPA, Erisman JW, (2004), ‘Variability of Particulate Matter Concentrations Along Roads and Motorways Determined by a Moving Measurements Unit’ Atmospheric Environment, Vol. 38, pp. 2993-3002.
13	Keywood MD, Ayers GP, Gras JL, Gillett RW, Cohen DD, (1999), ‘Relationships Between Size Segregated Mass Concentration Data and Ultrafine Particle Number Concentrations in Urban Areas’ Atmospheric Environment, Vol. 33, pp. 2907-2913.
14	Gramotnev GZ, Ristovski Z, (2004), ‘Experimental Investigation of Ultra-Fine Particle Size Distribution Near a Busy Road’ Atmospheric Environment, Vol. 38, pp. 1767-1776.
15	Donaldson K, Li XY, Mac-Nee W, (1998), ‘Ultrafine (Nanometre) Particle Mediated Lung Injury’ Journal of Aerosol Science, Vol. 29, No. 5/6, pp. 553-560.
16	Jaques PA, Kim CS, (2000), ‘Measurement of Total Lung Deposition of Inhaled Ultrafine Particles in Healthy Men and Women’ Inhalation Toxicology, Vol. 12, pp. 715-731.
17	Ferin J, Oberdorster G, Penney DP, Soderholm SC, Gelein R, Piper HC, (1990), ‘Increased Pulmonary Toxicity of Ultrafine Particles? 1 Particle Clearance, Translocation, Morphology’ Journal of Aerosol Science, Vol. 21, pp. 384-387.
18	Ferin J, Oberdorster G, Penney DP, (1992), ‘Pulmonary Retention of Ultrafine and Fine Particles in Rats’ American Journal of Respiratory Cell and Molecular Biology, Vol. 6, pp. 535-542.
19	Oberdorster G, (2000), ‘Toxicology of Ultrafine Particles: In Vivo Studies’ Philosophical Transactions of the Royal Society of London A, Vol. 358, pp. 2719-2740.
20	Shi MM, Godleski JJ, Paulauskis JD, (1996), ‘Regulation of Macrophage Inflammatory Protein-1-Alpha Messenger-RNA by Oxidative Stress’ Journal of Biological Chemistry, Vol. 271, pp. 5878-5883.
21	Harrison RM, Yin J, (2000), ‘Particulate Matter in the Atmosphere: Which Particle Properties are Important for its Effects on Health?’ Science of the Total Environment, Vol. 249, pp. 85-101.
22	Schwartz J, Dockery DW, Neas JM, (1996), ‘Is Daily Mortality Associated Specifically with Fine Particles?’ Journal of Air and Waste Management Association, Vol. 46, pp. 927-939.
23	Chaloulakou A, Kassomenos P, Spyrellis N, Demokritou P, Koutrakis P, (2003), ‘Measurements of PM10 and PM2.5 Particle Concentrations in Athens, Greece’ Atmospheric Environment, Vol. 37, pp. 649-660.
24	Matson U, Ekberg LE, Afshari A, (2004), ‘Measurement of Ultrafine Particles: A Comparison of Two Handheld Condensation Particle Counters’ Aerosol Science and Technology, Vol. 38, pp. 487-495.
25	Matson U, (2005), ‘Indoor and Outdoor Concentrations of Ultrafine Particles in Some Scandinavian Rural and Urban Areas’ Science of the Total Environment, Vol. 343, pp. 169-176.
26	Westerdahl D, Fruin S, Sax T, Fine PM, Sioutas C, (2005), ‘Mobile Platform Measurements of Ultrafine Particles and Associated Pollutant Concentrations on Freeways and Residential Streets in Los Angeles’ Atmospheric Environment, Vol. 39, pp. 3597-3610.
27	Kaur S, Nieuwenhuijsen MJ, Colvile RN, (2005), ‘Pedestrian Exposure to Air Pollution Along a Major Road in Central London, U.K.’ Atmospheric Environment, Vol. 39, pp. 7307-7320.