Open access
Submitted: August 21st, 2012 Published: May 8th, 2013
DOI: 10.5772/55499
From the Edited Volume
Edited by Steven Silvern and Stephen Young
Submitted: August 21st, 2012 Published: May 8th, 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.