Open access
Submitted: January 19th, 2012 Published: March 21st, 2012
DOI: 10.5772/39298
From the Edited Volume
Edited by Ivan Padron
Submitted: January 19th, 2012 Published: March 21st, 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.