Open access
Submitted: March 22nd, 2011 Published: April 18th, 2012
DOI: 10.5772/30733
From the Edited Volume
Edited by Thomas Brzozowski
Submitted: March 22nd, 2011 Published: April 18th, 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.