Open access
Submitted: 12 May 2010 Published: 14 February 2011
DOI: 10.5772/13842
From the Edited Volume
Edited by Stanisław Grundas
Submitted: 12 May 2010 Published: 14 February 2011
© 2011 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike-3.0 License, which permits use, distribution and reproduction for non-commercial purposes, provided the original is properly cited and derivative works building on this content are distributed under the same license.