Open access
Submitted: March 26th, 2012 Published: January 16th, 2013
DOI: 10.5772/52946
From the Edited Volume
Edited by Gustavo Ruiz and Juan A. Michell
Submitted: March 26th, 2012 Published: January 16th, 2013
© 2013 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.