1. ATSDR (Agency for Toxic Substances and Disease Registry). (1988). The nature and extent of lead poisoning in children in the United States: A report to congress. Atlanta: US Public Health Service.
2. Benetou-Marantidou, A., Nalou, S., & Micheloyiannis, I. (1985). The use of a battery of tests for the estimation of neurological effects of lead in children. In T. D. Lekkas (Ed.), International conference heavy metals in the environment, New Orleans, September (Vol. 1, pp. 204–209). Edinburgh: CEP Consultants.
3. Brockhaus, A., Collet, W., Dolgner, R., Engelke, R., Ewers, U., Frier, I., et al. (1988). Exposure of lead and cadmium of children living in different areas of North-West Germany, results of biological monitoring studies, 1982–1986. International Archives of Occupational and Environmental Health, 60, 211–222.
4. Brunekreef, B., Veenstra, S. J., Bierksteker, K., & Boleij, J. S. (1981). The Arnhem lead study I. Lead uptake by 1- to 3-year-old children living in the vicinity of a secondary lead smelter in Arnhem, The Netherlands. Environmental Research, 25, 441–448.
5. Calabrese, E. J., Stanek, E. J., James, R. C., & Roberts, S. M. (1997). Soil ingestion: A concern for acute toxicity in children. Environmental Health Perspectives, 105, 1354–1358.