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http://www3.est.edu.br/nepp/revista/002/02elma.htm
http://www3.est.edu.br/nepp/revista/002/ano02n1_05.pdf
www.rbhcs.com/index_arquivos/artigo.omovimentomucker.pdf
http://www2.senado.leg.br/bdsf/bitstream/h...1093/710311.pdf