References
- ASTEL A., WALNA B., KURZYCA I. 2007. Chemometrics in the assessment of local and trans-boundary air pollution. Int. J. of Environment and Health 1, 1: 1-12.
- GĄSIOREK M. 2011. Heavy metals in soils of Henryk Jordan Park in Krakow. Ecological Chemistry and Engineering 18, 5-6: 697-702.
- JASIEWICZ C., BARAN A., ANTONKIEWICZ J. 2009. Assessment of chemical composition and sanitary state of sand in selected sandboxes in Krakow. Journal Elementology 14, 1: 79-90.
- KABATA-PENDIAS A., PENDIAS H. 1999. Biogeochemistry of trace elements. PWN, Warszawa.
- KABATA-PENDIAS A., PIOTROWSKA M. 1995. Basis for the assessment of chemical contamination of soils. Heavy metals, sulfur and PAHs. Library of Environmental Monitoring, PIOŚ, IUNG, Warszawa.
- KICIŃSKA-ŚWIDERSKA A. 2004. Wpływ składu mineralnego i geochemicznego na uwalnianie metali z pyłów przemysłowych z ZGH „Bolesław” w Bukownie. Geologia, AGH Kraków, T. 30, p. 191-205.
- LJUNG K. 2006. Metals in urban playground soils, distribution and bioaccessibility. Doctoral thesis Swedish University of Agricultural Sciences, Uppsala.
- LJUNG K., OOMEN A., DUITS M., SELINUS O., BERGLUND M. 2007. Bioaccessibility of metals in urban playground soils. Journal of Environmental Science and Health, Part A: Toxic/ Hazardous Substances and Environmental Engineering, vol. 42, 9, p. 1241-1250.
- MIKO M.S., MIKO S., HASAN O., MESIC S., BUKOVEC D. 2010. Sources of potentially toxic elements in playground soils of Zagreb (Croatia). In: SEGH Conference Schedule & Abstract, Galway, Ireland, p. 105.
- NIEĆ J., BARANOWSKA R., DZIUBANEK G., ROGALA D. 2013. Children’s exposure to heavy metals in the soils of playgrounds, sport fields, sandpits and kindergarten grounds in the region of Upper Silesia. Journal Ecology and Health 17, 2: 55-62.
- SIDJIMOV M., METODIEV V., MECHKUEVA L., STANKOVA D., PAUNOVA G., SHANOVA L. 2013. Heavy metals in sandpits and sandboxes of public playgrounds. Journal of Balkan Ecology 16, 4: 413-416.
- SZWALEC A., MUNDAŁA P. 2012. Contents of Cd, Pb, Zn and Cu in soil of selected parks of city of Kraków. Environmental Protection and Natural Resources, Warsaw, 53, p. 63-72.
- REGULATION OF THE MINISTER OF THE ENVIRONMENT of 9 September 2002, on soil quality standards and earth quality standards, Dz. U. 165, 1359. Annex.
- WHO, 1982. Safety evaluation of certain food additives and contaminants: Zinc. Food additives Series No. 17. WHO, Geneva.
- WHO, 1989. Evaluation of certain food additives and contaminants. WHO Techn. Rep. Ser. 776, Geneva.
- WHO, 1993. Evaluation of certain food additives and contaminants. WHO Techn. Rep. Ser. 837, Geneva.
- WHO, 2011. Evaluation of certain food additives and contaminants. WHO Techn. Rep. Ser. 960, Geneva.
- WONG J.W.C., MAK N. K. 1997. Heavy metal pollution in children playgrounds in Hong Kong and its health implications. Environmental Technology Vol. 18, 1, p. 109-115.