Open access peer-reviewed chapter
By Mariana Paulino and Filipe Teixeira-Dias
Submitted: May 24th 2011Reviewed: April 12th 2012Published: August 29th 2012
DOI: 10.5772/47996
Downloaded: 2090
© 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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