Open access peer-reviewed chapter
By Hiroshi Kawanabe
Submitted: May 31st 2011Reviewed: December 27th 2011Published: February 29th 2012
DOI: 10.5772/37164
Downloaded: 1748
© 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.
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