Open Access
Eur. Phys. J. Appl. Phys.
Volume 63, Number 3, September 2013
Article Number 30001
Number of page(s) 17
Section Review Article
Published online 03 September 2013

© The Author(s) 2013

Licence Creative Commons
Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.

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