1. Heilbron Filho PFL, Xavier AM (1992) Radioactive lightning rods: protection or danger? In: IV Congresso Geral de Energia Nuclear, 5–9 de julho, 1992, Rio de Janeiro, pp. 493–498. (in Portuguese)
2. US Environmental Protection Agency. Toxicity characteristic leaching procedure (Method 1311). July/1992. Available at: http://www.epa.gov/epaoswer/hazwaste/test/main.htm . Cited 30 May 2007
3. Fornaro A, Gutz IGR (2006) Wet deposition and related atmospheric chemistry in the São Paulo metropolis, Brazil. Part 3: trends in precipitation chemistry during 1983–2003. Atmos Environ 40:5893–5901
4. Instituto de Pesquisas Espaciais (2006) Clima. http://www.cptec.inpe.br/clima/monit/monitor_brasil.shtml . Cited 15 Feb 2006
5. Miranda LET, Vicente R (1999) A process for managing radioactive lightning rods in Brazil. Instituto de Pesquisas Energéticas e Nucleares. Departamento de Rejeitos Radioativos. São Paulo (in Portuguese)