Open access
Submitted: 21 October 2010 Published: 16 November 2011
DOI: 10.5772/17533
From the Edited Volume
Edited by Andrzej Bartoszewicz
Submitted: 21 October 2010 Published: 16 November 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.