Open access
Submitted: 07 January 2012 Published: 18 October 2012
DOI: 10.5772/50143
From the Edited Volume
Edited by Sebastian Ventura
Submitted: 07 January 2012 Published: 18 October 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.