Open access
Submitted: January 26th, 2012 Published: February 29th, 2012
DOI: 10.5772/39367
From the Monograph
Edited by Virginia Hernandez Montoya and Adrian Bonilla Petriciolet
Submitted: January 26th, 2012 Published: February 29th, 2012
© 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.