1. World Health Organization. Air quality guidelines for Europe. WHO Regional Publications, European Series No. 23, Copenhagen, 1987. p. 242–61.
2. Lead—biological monitoring of exposure and effects;Skerfving;J Trace Elem Exp Med,1998
3. Dose dependent reduction of erythroid progenitor cells and inappropriate erythropoietin response in exposure to lead;Osterode;Occup Environ Med,1999
4. Measurement of viscosity of biological fluids by cone-plate viscometer;Wells;J Lab Clin Med,1961
5. A simple method of estimating whole blood viscosity at standardized hematocrit;Matrai;Clin Hemorheol,1987