Open access
Submitted: 24 March 2011 Published: 23 May 2012
DOI: 10.5772/30962
From the Edited Volume
Edited by Jorge Martin Garcia and Julio Javier Diez Casero
Submitted: 24 March 2011 Published: 23 May 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.