Open access
Submitted: 09 May 2011 Published: 23 March 2012
DOI: 10.5772/35150
From the Edited Volume
Edited by Fabio Solari, Manuela Chessa and Silvio P. Sabatini
Submitted: 09 May 2011 Published: 23 March 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.