Open access
Submitted: 20 September 2013 Published: 19 February 2014
DOI: 10.5772/57196
From the Edited Volume
Edited by Martha Patricia Hernandez- Vergara and Carlos Ivan Perez-Rostro
Submitted: 20 September 2013 Published: 19 February 2014
© 2014 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.