Open access
Submitted: 07 December 2011 Published: 26 July 2012
DOI: 10.5772/39235
From the Edited Volume
Edited by Gustavo Lopez Badilla, Benjamin Valdez and Michael Schorr
Submitted: 07 December 2011 Published: 26 July 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.