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Copyright Holders: Global Science Press
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Self-archiving policy
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Conditions
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Accepted version:
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√
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Published version:
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?
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Remarks:
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| The Work may be reproduced by any means for educational and scientific purposes by the Author(s) or by others without fee or permission with the exception of reproduction by services that collect fees for delivery of documents. The Author(s) may use part or all of this Work or its image in any further work of his/her (their) own. In any reproduction, the original publication by the Publisher must be credited in the following manner: “First published in [Publication] in [volume and number, or year], published by Global Science Press,” and the copyright notice in proper form must be placed on all copies. |
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Verification Date:
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22.11.2011 |
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