©The Author(s). (Published by Hindawi Publishing Corporation.)

Copyright Holders:   ©The Author(s). (Published by Hindawi Publishing Corporation.)

Self-archiving policy

Conditions

Accepted version:

Open Access Journal

Published version:

Open Access Journal

Remarks:

 Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution license, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.

Verification Date:

 04.07.2011