[1. Regulation on batteries and accumulators and unusable batteries and accumulators, CM Decree № 351 of 27.12.2012 (prom., SG No. 2 of 8.01.2013, effective from 8.01.2013, amended, No. 6 of 22.1.2013, amended and suppl., SG No. 51 of 11.06.2013, effective from 11.06.2013). Bulgarian.]Search in Google Scholar
[2. Management of discarded batteries and accumulators. INFRABILD – Stroiteli [Internet]. 2012 [cited 2014 Oct 12];VI(7) [about 1 p.]. Available from: http://stroiteli.elmedia.net/sti/bg/2012-7/editorials/8_02202.html, Bulgarian.]Search in Google Scholar
[3. Directive 2006/66/ EC of the European Parliament and of the Council on detailed rules for the calculation of recycling efficiency of the recycling processes of waste batteries and accumulators.]Search in Google Scholar
[4. Directive 2000/53/ EC of the European Parliament and of the Council of 18.09.2000 on disused vehicles.]Search in Google Scholar
[5. Mauzerall D, Granick S. The occurrence and determination of ALA and PBG in urine. J Biol Chem. 1958;219:435-46.10.1016/S0021-9258(18)65809-0]Search in Google Scholar
[6. Zapryanov Z. Lead. In: Kaloyanova F, editor. Hygienic Toxicology vol. 3. Sofia: Meditzina i Fizkultura; 1983. p. 9-22. Bulgarian.]Search in Google Scholar
[7. Georgieva P, Tsalev D. Lead levels in blood, nails and teeth as biomarkers of exposure – informational value and relevance. Bulgarian Journal of Chemistry. 2013;2(4):133-44. Bulgarian.]Search in Google Scholar
[8. Gordon JN. Taylor A. Bennett PN. Lead poisoning: case studies. Br J Clin Pharmacol. 2002;53(5):451-8.10.1046/j.1365-2125.2002.01580.x187435611994050]Search in Google Scholar
[9. Skerfving S, Bergdahl IA. Lead. In: Nordberg G, Fowler B, Nordberg M, Friberg L, editors. Handbook on the Toxicology of Metals. 3rd ed. NY: Academic Press; 2007. p. 599-643.10.1016/B978-012369413-3/50086-0]Search in Google Scholar
[10. Sommar JN, Svensson MK, Björ BM, Elmståhl SI, Hallmans G, Lundh T, et al. End-stage renal disease and low level exposure to lead, cadmium and mercury; a population-based, prospective nested case-referent study in Sweden. Environ Health. 2013;12:9.10.1186/1476-069X-12-9356694823343055]Search in Google Scholar
[11. Tell I, Somervaille LJ, Nilsson U, Bensryd I, Schutz A, Chettle DR, et al. Chelated lead and bone lead. Scand J Work Environ Heath. 1992;18(2):113-9.10.5271/sjweh.16031604271]Search in Google Scholar
[12. Crinnion WJ. EDTA redistribution of lead and cadmium into the soft tissues in a human with a high lead burden – should DMSA always be used to follow EDTA in such cases? Altern Med Rev. 2011;16(2):109-12.]Search in Google Scholar
[13. Xu Y, Wang Y, Wang L, Zhao M, Zhang X, et al. Lead detoxification activities of a class of novel DMSA-amino acid conjugates. Chem Res Toxicol. 2011;24(6):979-84.10.1021/tx200155g21591669]Search in Google Scholar
[14. Ogawa M, Nakajima Y, Kubota R, Endo Y. Two cases of acute lead poisoning due to occupational exposure to lead. Clin Toxicol. 2008;46(4):332-5.10.1080/1556365070181644818363133]Search in Google Scholar
[15. Petracca M, Scafa F, Boeri R, Flachi D, Candura SM. Imported occupational lead poisoning: report of four cases. Med Lav. 2013;104(6):428-33.]Search in Google Scholar
[16. Kuneva T. Lead poisoning and compounds. In: Kostova V, Petkova V, editors. Occupational diseases. Sofia: Ral-kolobar; 2007. p. 33-38. Bulgarian.]Search in Google Scholar
[17. LaDou Joseph. Occupational & Environmental Medicine. 4th ed. McGraw-Hill Companies, Inc. 2007.]Search in Google Scholar
[18. Labudda M. Lead hepatotoxicity: selected aspects of pathobiochemistry -Med Pr. 2013;64(4):565-8. Polish.10.13075/mp.5893.2013.004024502120]Search in Google Scholar
[19. Weaver VM, Griswold M, Todd AC, Jaar BG, Ahn KD, Thompson CB, et al. Longitudinal associations between lead dose and renal function in lead workers. Environ Res. 2009;109(1):101-710.1016/j.envres.2008.09.005272294119038382]Search in Google Scholar