Open access peer-reviewed chapter
By Wagner Luiz Ramos Barbosa, Myrth Soares do Nascimento, Lucianna do Nascimento Pinto, Fernando Luiz Costa Maia, Antonio Jorge Ataíde Sousa, José Otávio Carréra Silva Júnior, Maurícia Melo Monteiro and Danilo Ribeiro de Oliveira
Submitted: February 3rd 2011Reviewed: July 18th 2011Published: January 18th 2012
DOI: 10.5772/26078
Downloaded: 6951
© 2012 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution 3.0 License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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