Open access
Published: 02 May 2012
DOI: 10.5772/45941
From the Edited Volume
Edited by Manuela Chessa, Fabio Solari and Silvio P. Sabatini
Published: 02 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.