References included in article:

Order of appearence	Full citation	SRCosmos Link
1	Backstrom M, Karlsson S, Allard B, 2004. Metal leachability and anthropogenic signal in roadside soils estimated from sequential extraction and stable lead isotopes. Environ. Monit. Assess. 90: 135–160.
2	Backstrom M, Nilsson U, Hakansson K, Allard B, Karlsson S, 2003. Speciation of heavy metals in road runoff and roadside total deposition. Water Air Soil Pollut. 147: 343–366.
3	Barany E, Bergdahl IA, Bratteby LE, Lundh T, Samuelson G, Schutz A, Skerfving S, Oskarsson A, 2002. Trace element levels in whole blood and serum from Swedish adolescents. Sci. Total Environ. 286: 129–141.
4	Bourcier DR, Hindin F, Cook JC, 1980. Titanium and tungsten in highway runoff at Pullman, Washington. Int. J. Environ. Stud. 15: 145–149.
5	Brady GS, Glauser HR, Vaccari JA, 1997. Materials handbook, 14th ed. Mc-Graw-Hill, New York.
6	Folkeson L, 1992. Miljo- och halsoeffekter av dubbdacksanvandningen. Litteraturoversikt. VTI-Meddelande 694.
7	Gustafsson JP, 2003. Modelling molybdate and tungstate adsorption to ferrihydrite. Chem. Geol. 200: 105–115.
8	Hinds WC, 1999. Aerosol technology, 2nd ed. John Wiley & Sons, New York.
9	Koljonen T, (ed.) 1992. The geochemical atlas of Finland. Part 2, Till. Geological Survey of Finland, Espoo.
10	Kukkonen J, Salmi T, Saari H, Konttinen M, Karstasenpaa R, 1999. Review of urban air quality in Finland. Boreal Env. Res. 4: 55–65.
11	Kupiainen K, Tervahattu H, Raisanen M, 2003. Experimental studies about the impact of traction sand on urban road dust composition. Sci. Total Environ. 308: 175–184.
12	Kupiainen K, Tervahattu H, Raisanen M, Makela T, Aurela M, Hillamo R, 2005. Environ. Sci. Technol. 39: 699–706.
13	Laitera S, Karlsson C, Niemela M, Rosama L, Taipaleenmaki M, Saario J, Kivilaakso M, Lehtinen S, Jokinen M, 2005. Turun kaupunkiseudun ilmanlaatu vuonna 2004. Available on the web at http://www.turkuenergia. fi/fi/dokumentit/219/Ilmanlaatu+2004+netti.pdf. [In Finnish with English and Swedish summary].
14	Ljungqvist L, 2003. Tungmetaller i vaggmossa i Stockholms lan. Lansstyrelsens rapportserie, rapport 12, 2003. Available on the web at http://www.ab.lst.se/upload/dokument/publikationer/M/Rapportserien/R2003_12_Tungmetaller_mossa_webb.pdf.
15	Pakkanen TA, Kerminen VM, Korhonen CH, Hillamo RE, Aarnio P, Koskentalo T, Maenhaut W, 2001a. Use of atmospheric elemental size distributions in estimating aerosol sources in the Helsinki area. Atmos. Environ. 35: 5537–5551.
16	Pakkanen TA, Loukkola K, Korhonen CH, Aurela M, Makela T, Hillamo RE, Aarnio P, Koskentalo T, Kousa A, Maenhaut W, 2001b. Sources and chemical composition of atmospheric fine and coarse particles in the Helsinki area. Atmos. Environ. 35: 5381–5391.
17	Peltola P, Astrom M, 2003. Urban geochemistry: a multimedia and multielement survey of a small town in northern
18	Europe. Environ. Geochem. Health 25: 397–419. Sudarshan T.S., Yao Z. & Stiglich J.J. 1998. WC-Co enjoys proud history and a bright future. Metal Powder Reports 53: 32–36.
19	Zanetti G, Fubini B, 1997. Surface interaction between metallic cobalt and tungsten carbide particles as a primary cause of hard metal lung disease. J. Mater. Chem. 7: 1647–1654.