Open access peer-reviewed chapter
By Elísio Estanque and Hermes Augusto Costa
Submitted: June 24th 2011Reviewed: February 1st 2012Published: March 28th 2012
DOI: 10.5772/38588
Downloaded: 2021
© 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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