Open access
Submitted: 11 January 2012 Published: 28 August 2013
DOI: 10.5772/55876
From the Edited Volume
Edited by Marco G. Beghi
Submitted: 11 January 2012 Published: 28 August 2013
© 2013 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.