Open access
Submitted: December 1st, 2010 Published: October 21st, 2011
DOI: 10.5772/23992
From the Edited Volume
Edited by Danilo Godone and Silvia Stanchi
Submitted: December 1st, 2010 Published: October 21st, 2011
© 2011 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.